What Is Xanthan Gum?

Some people are suspicious of ingredients with unfamiliar names, such as xanthan gum. We are frequently asked, “Aren’t your dishes chock-full of chemicals?” Well, yes, but all foods are, including the most natural and organic ones. But nearly all of those chemicals are derived from natural ingredients or processes that have been used for decades.

First discovered by USDA scientists in the 1950s, xanthan gum is fermented by plant-loving bacteria, characterized by sticky cell walls. It is no less natural than vinegar or yeast. We think xanthan gum is one of the best discoveries in food science since yeast.

It is used as a thickener or stabilizer in a wide variety of foods found on grocery store shelves. Many canned or prepared products contain xanthan gum: salad dressings, sauces, soups, and baked goods — particularly those that are gluten-free because xanthan gum can perform some of the same functions as gluten.

Xanthan gum is one of the most useful food additives around; it is effective in a wide range of viscosities, temperatures, and pH levels. It is easy to use, has no taste, and generally works quite well. And it can thicken liquids at extremely low concentrations – as little as 0.1% by weight can yield a thick liquid, and 0.5% by weight can make a thick paste (this is why it is best to weigh out xanthan gum with a digital scale rather than use volumetric measurements). Traditional thickeners like flour typically require far larger amounts to do a similar job. The quantity matters because the more thickener you have as a fraction of the total mixture the more likely it is to impose an undesirable texture and inhibit flavor.

Ready to try xanthan gum? Take a look at our recipe library for recipes for Spinach Pesto, Jus Gras, and Wasabi Cream. Check back later this month, when we’ll be showcasing more recipes from Modernist Cuisine at Home that use xanthan gum.

adapted from Modernist Cuisine and Modernist Cuisine at Home

New Recipe in the Library: Pistachio Gelato

A quenelle scoop adds dramatic flair to this delicious dessert.

It may be October, but despite the weather, we refuse to give up our favorite frozen treat: pistachio gelato. We take a good look at the recipe, complete with tips and a video, in our newest installation in the Recipe Library. Because this recipe calls for locust bean gum and carrageenan, Nathan has taken the opportunity to explain what’s so great about hydrocolloids. Plus, we’ve included a table about the stabilization properties of hydrocolloids.

Stephen Colbert liked our dairy-free, egg-free gelato; we’re sure you will, too.

Review: Ideas in Food

Although this blog is mostly about our book, Modernist Cuisine, I’d like to direct some attention toward another book that has come out recently: Ideas in Food: Great Recipes and Why They Work by Aki Kamozawa and H. Alexander Talbot. Aki and Alex have been friends of mine since we met online six years ago. Virtually nobody knows them from their restaurant cooking, because their main professional gig was at an obscure lodge in Colorado. The inn had only eight rooms and catered primarily to wealthy elk hunters, who sat down to dinner expecting ranch-style comfort food and instead got a state-of-the-art tasting menu. I once made the pilgrimage out to meet them and eat their food, and it wasn’t an easy journey. The nearest airport had no commercial flights and was more than an hour’s drive from the lodge.

Despite the obscurity of that restaurant, Alex and Aki have gained fame because they also run a website, Ideas in Food, which chronicles what they have learned from their many creative experiments with cuisine. Over the years, the two have written about many culinary innovations of their own and have also reported and explained techniques discovered by others. Ideas in Food has become a must-read for anyone interested in the evolution of cooking techniques.

Ultimately, the reputation that Alex and Aki gained from the site grew substantial enough to launch their careers as cooking instructors, consultants, magazine columnists and now cookbook authors. It’s a story that could have happened only in this Internet-enabled meritocracy that allows talented people to reach wide audiences regardless of their location or financial resources.

Ideas in Food, the book, brings their cuisine to a new and wider audience. It makes an interesting complement and contrast to Modernist Cuisine. It’s a vastly smaller book (319 pages, each of which is a bit less than half the size of a page in MC), and as a result is vastly more affordable ($25 list price, versus $625 for MC). It contains no photos or diagrams, which is another big difference, because MC is an intensely visual book.

Ideas in Food is published by a traditional publisher (Clarkson Potter), and it seems clear that a lot of effort was made to ensure that it conforms to the normal expectations for cookbooks. This is part of the reason that the book is small and inexpensive and has no photos but that is only the tip of the iceberg. I find this fascinating, because in Modernist Cuisine, we basically broke all of these rules, whereas Aki and Alex had to live with them. It is entirely appropriate that we each took the paths we did, because we had totally different goals. Indeed, that is the fundamental reason that we at MC decided to start our own publishing company.

The first 237 pages of Ideas in Food are organized into a section called “Ideas for Everybody.” The recipes give both volumetric measures (cups, tablespoons, etc.) and weights (in grams only) for the ingredients. A lot of effort has been made to simplify the recipes. They bravely (and in my view, correctly) position sous vide as a technique for everybody, and also include mention of the CVap oven (a brand of low-temperature steam oven, which we cover at length in MC).

The last 67 pages of the book are set aside for a different section titled “Ideas for Professionals,” and the discussion here focuses on hydrocolloids, both starches and gums. In this section, the volumetric measurements go away; only grams are given in the recipes. Many of the basic techniques of hydrating and using hydrocolloids are covered here, including a basic discussion of spherification.

The separation of “everybody” from “professionals” is, on the one hand, a reasonable compromise. I am sure that this structure let them get away with including some fascinating material, while at the same time, letting their publisher feel good about the accessibility of the book.

On the other hand, I can’t help but think it ridiculous to imply that xanthan gum, tapioca flour, and some other common ingredients need to be quarantined off in a section for “professionals.” Xanthan gum is available in most supermarkets. (In Seattle at least, every Safeway carries Bob’s Red Mill brand ingredients, and xanthan gum is one of them.) Xanthan gum is super easy to use you just stir it into a liquid to thicken it. Unlike some other hydrocolloids, xanthan gum’s performance doesn’t depend on the temperature of the liquid or its ion content. Just stir!

The only thing even vaguely technical about xanthan gum is that you use it in small quantities. If you want to thicken a sauce with xanthan gum, you typically add about 0.1% to 0.2% xanthan gum by weight. To put that in perspective, the typical amount of salt you put in a savory cuisine sauce is about 1% so you use about one-tenth to one-fifth as much xanthan gum as salt. That just means you need a decent scale. One liter of sauce needs 1-2 grams of xanthan gum. Now, why is that hard?

Please don’t think that I’m dumping on Aki and Alex Ideas in Food is great. I’m not even dumping on the people at Clarkson Potter. After all, they have tons of experience selling cookbooks (a lot more than I have!), and I am sure that they made the decisions that they think are best. They very likely will sell Ideas in Food to many times the number of people who buy MC.

Another way in which the book differs from MC is in the kind of recipes it contains. Here too, I see the influence of the editing and selection process. A joke I have with Alex is that of the most interesting techniques that he and Aki have pioneered on their website, more of them appear in my book than in his! That probably isn’t literally true, because Ideas in Food (the book) often mentions the techniques in passing. But Modernist Cuisine certainly covers them in more detail.

All in all, I heartily recommend Ideas in Food. It is a great introduction to many important ideas and techniques in cooking.

A Modernist Christmas Feast

Merry Christmas and Happy New Year from the Modernist Cuisine culinary team!

Allow me introduce myself. My name is Maxime Bilet, and I am the head chef of research and development in the culinary lab and one of the co-authors of Modernist Cuisine. It has been a very intense three-year journey of creative endeavors and accomplishments here in the kitchen. The entire Modernist Cuisine team has shared an amazing learning experience that we are excited to soon share with you. Every dish, recipe, and photo in our book tells a story of our inspirations, the seasonal bounty of the Pacific Northwest, the very unique processes that we learned to refine, and most importantly, a culinary collaboration that we hope will inspire other chefs and bring clarity and awareness to the great insights of Modernist cooking.

For me, Christmas is both a period of sharing and introspection. It can be an observance of gratitude, a celebration of life, and also a time to share with those whom we care deeply for. As chefs, our greatest gift is to create a feast of abundance. Each year, the flavors or the inspiration may change, but the intention is always to express our love for family and friends by feeding them as best we know how.

As a Frenchman, the Yuletide meal for me means goose, foie gras, chestnuts, farce, gratin d’Auphinois, roasted pears, and Bûche de Noël. Since I grew up in New York, most of my holiday meals have been a wonderful combination of American tradition and French flair. This has meant a little herb butter with the turkey, some mustard jus with the baked ham, a gratin d’Auphinois made with yams (c’est sacrilège!), or even having a praline-flavored Bûche de Noël share the table with apple pie and pecan ice cream. I have come to love baked sweet potatoes, sage-scented bread stuffing, and cranberry jelly from a can as much as any other Christmas dish.

A few weeks ago, Anjana, Grant, Johnny, Sam, and I got together and discussed what might be a way to share our Modernist interpretation of a Christmas feast, something that would exemplify our experiences together working on the book, as well as our varied cultural and life experiences. One iconic Christmas image that we all shared was the honey-glazed ham with pineapple rings and maraschino cherries. Thus, we decided that we would provide our Modernist take on this cherished dish.

For our version of honey-glazed ham, we cure and slowly cook a pork shank. Then we serve it with bright cherry gelée orbs and shaved fresh pineapple. Johnny’s simple glaze of fresh pineapple juice and honey not only brings balance to the rich and salty pork, but also unifies it with the other components.

As for the rest of the feast, we decided that a cabbage component, a sweet potato dish, and a pumpkin pie would round out our version of a Modernist Christmas meal. So, first, nothing is better than deep-fried Brussels sprouts, period. (Thank you, David Chang!) You can make anyone who hates vegetables eat Brussels sprouts simply by deep-frying them until deeply golden. They will have an incredibly complex and nutty flavor.

Our sweet potato dish consists of confit in butter cooked sous vide and topped with a delicate version of “whipped marshmallow” made by aerating a fried sage infusion. Finally, Grant worked on an elegant rendition of pumpkin pie that turned out beautifully. I’d like to think that it turned out as “Frenchie” as pumpkin pie has ever been, but since Grant is a native of the Pacific Northwest, I’ll have to settle for Modernist.

We really hope you enjoy these recipes. Happy holidays to you and yours.

Maxime.


Deep-Fried Brussels Sprouts

Yields: 4-8 portions

Ingredient Quantity Scaling Procedure
Brussels sprouts 500 g 100% Peel away outer green leaves off from Brussels sprouts and reserve.
Frying oil as needed Cut sprouts in half lengthwise and deep-fry in 190 °C / 375 °F oil for approximately 3-4 min, until deeply caramelized.Drain on paper towels.
Salt to taste Season fried Brussels sprouts to taste and reserve warm.
Brussels sprout leaves, from above as needed Blanch reserved outer leaves in boiling water for 2 min and then shock in ice water.
Unsalted butter 50 g 10% Melt butter in pot and warm blanched leaves.
Salt to taste Season leaves.
Lime juice to taste Garnish the fried sprouts with the sautéed leaves.Season with lime juice.

Christmas Ham Hock with Pineapple and Cherries

Yields: 4-8 portions

Ingredient Quantity Scaling Procedure
Ham hock, fresh, with skin on and bone in 900 g 100% Set hock aside, combine all other components for liquid cure and dissolve.
Water 2 kg 222% Submerge hock with cure and vacuum seal.
Salt 200 g 22% Cure hock refrigerated for 3 d.
Brown sugar 80 g 8.8% Remove hock from brine, rinse and vacuum seal.
Sodium nitrate, optional (for color) 20 g 2.2% Refrigerate vacuum-sealed hock for 24 h.
Black peppercorns 10 g 1.1% Cook sous vide at 65 °C / 149 °F for 48 h.
Coriander seeds 10 g 1.1% Remove hock from bag and clean away any excess gelatin.
Cloves 4 g 0.4% Pat dry and reserve.
Pineapple juice, fresh 320 g 35% Combine juice and honey in pot.
Clear liquid honey 80 g 8.8% Reduce over medium high heat until syrupy, about 10 min.Reserve warm.

Deep-fry cooked pork shank in 200 °C / 390 °F oil until golden brown and slightly puffed, about 3 min.

Brush with glaze and slice to desired thickness off of bone.

Fresh pineapple, peeled 50 g 5.5% Slice 3 mm / ? in thick and punch out coins with 4 cm / 1½ in diameter ring mold.
Black cherry juice (from bottled) 100 g 100% Season cherry juice as desired. It will be a seasoning for the pork, so be generous about acidity and sweetness.
Fructose to taste Blend in calcium gluconolactate and xanthan gum to fully disperse.
Malic acid to taste
Calcium gluconolactate 1 g 1% Vacuum seal and refrigerate for 1 h to hydrate.
Xanthan gum 0.15 g 0.15% Pour into silicone hemisphere molds and freeze.
Water 500 g 100% Combine and heat to dissolve to make setting bath for cherry spheres.
Sodium alginate 2.5 g 0.5% Heat bath to a simmer and remove from heat.Drop frozen cherry spheres into hot sodium alginate bath.

Allow spheres to set in bath until the center of each sphere is no longer frozen, about 3 min.

Rinse spheres in hot water three times and reserve in fresh warm water until ready to serve.

Arrange thinly sliced pork with cherry spheres and pineapple. Serve with Brussels sprouts and sweet potato confit on side.

Garnet Yam Fondant with Sage Foam

Yields: 4-8 portions

Ingredient Quantity Scaling Procedure
Red garnet yam, peeled 175 g 175% Peel and use ring cutter to cut out tubes measuring 4 cm / 1½ in. in diameter and 6 cm / 2¼ in thick.
Water 125 g 125% Combine all and vacuum seal.
Unsalted clarified butter 27.5 g 27.5% Cook sous vide at 90 °C / 194 °F for 1 h 20 min.
Salt 4.5 g 4.5% Drain and remove from bag. Cool or serve immediately.
For yam chip:
Red garnet yam as needed Slice into 1 mm / 1?16 in sheets on mandolin.
Punch out disks that are 3 cm / 1¼ in. in diameter and reserve.
Isomalt 100 g 100% Combine all and bring to a boil to make syrup.
Sugar 100 g 100% Blanch yam disks in the syrup for about 15 s.
Water 100 g 100% Lay on nonstick tray and dehydrate at 62 °C / 145 °F for 12 h.
Maple syrup (Grade B) 40 g 40%
For sage foam:
Frying oil as needed Fry sage in 190 °C / 375 °F oil for about 10 s.
Sage 40 g 40% Drain on absorbent paper towels.
Water 300 g 300% Combine with fried sage leaves and vacuum seal.Cook sous vide at 90 °C / 194 °F for 30 min.

Strain and cool sage infusion.

Sugar 100 g 100% Add and dissolve into sage infusion.
Versawhip 3 g 3% Whip with electric whisk to form stiff peaks.
Xanthan gum 0.45 g 0.45% Spoon over sweet potatoes and garnish with yam chips.

Pumpkin Pie: Butternut Squash Custard

Yields: 600 g

Ingredient Quantity Scaling Procedure
Butternut squash, peeled and cubed 550 g 110% Place all ingredients in pressure cooker and cook at full pressure (15 psi) for 20 min.
Unsalted butter 110 g 22% Remove lid and reduce until the bottom of the pan is barely wet. Remove spices.
Water 100 g 20% Puree squash mixture, and pass through fine sieve.
Maple syrup (Grade B) 50 g 10% Measure 500 g of puree for recipe.
Salt 2 g 0.40%
Cinnamon stick 0.8 g 0.16%
Clove 0.25 g 0.05%
Mace 0.25 g 0.05%
Squash puree, from above 500 g 100% Place all in Thermomix and blend for 1 min.
Heavy cream 90 g 18% Turn on heat and continue blending until 90 °C / 194 °F is reached.
Maple syrup (Grade B) 40 g 8% Cast onto pastry table with bars at a thickness of 1.5 cm / ½ in until firmly set.
Salt 2 g 0.4% Refrigerate until use.
Toasted walnut oil 10 g 2%
Iota carregeenan 1.48 g 0.3%
Kappa carregeenan 1.48 g 0.3%

Pumpkin Pie: Ginger Cream

Yields: 250 g

Ingredient Quantity Scaling Procedure
Heavy cream 200 g 100% Whip all to medium peaks.
Sugar 40 g 20% Pipe 1 cm / ? in tip into cylinders with sides touching to make sheets.
Ginger juice, raw and fresh 15 g 7.5% Freeze completely.
Toasted walnut oil 7 g 3.5%
Xanthan gum 0.25 g 0.125%

Pumpkin Pie: Caramelized Crust

Yields: 600 g

Ingredient Quantity Scaling Procedure
Pastry flour 350 g 140% Blend in food processor and reserve.
Unsalted butter 250 g 100%
Ice water 105 g 42% Dissolve sugar and salt into water.
Sugar 15 g 6% In large bowl, pour flour and butter mixture over the liquid mixture.
Salt 10 g 4% Mix until just incorporated.Place on silicone mat and press into layer about 2.5 cm / 1 in thick.

Place in refrigerator and let rest for 1 h.

Remove and roll out 3 mm / ? in thick.

Rest in refrigerator for 1 h.

Bake in 160 °C / 320 °F oven until golden, about 18 min.

Maple syrup (Grade B) 100 g 40% Heat in pot until just melted and whisk to emulsify.
Unsalted butter 50 g 20% Brush all over the pastry crust and bake in 190 °C / 375 °F oven until dry, about 10 min.
Salt 2 g 0.8%
Pumpkin Pie: AssemblyYields: 4 portions
Ingredient Quantity Scaling Procedure
Butternut squash custard square 4 squares Cut crusts to desired dimensions.Cut custard to fit on top of crust, with crust evenly exposed on edges.

Cut frozen ginger cream into the same dimensions as the custard. Be sure to place cream on top while still frozen.

Transfer to serving dish.

Garnish with orange zest, grated walnut, and walnut oil.

Ginger cream 4 pieces
Caramelized crust 4 crusts
Orange zest, finely grated 4 shavings
Toasted walnuts, finely grated 16 walnuts
Walnut oil as needed