Xanthan gum is a fermented polysaccharide used as a thickener and stabilizer. Although technically a carbohydrate, it is used in extremely small amounts and contributes negligible net carbs, making it a staple in low-carb, keto, and diabetic-friendly cooking.

Quick Carb Snapshot

  • Carbs (per 100 g): ~78 g (mostly fiber)
  • Carbs (standard portion): ~0 g net per ¼ tsp
  • Glycemic Index: Very low
  • Similar Low-Carb Options: Guar gum, psyllium husk powder
  • Blood Sugar Impact: Lower
  • Keto-Friendly? Yes

Key Traits

  • Texture: Fine powder
  • Flavor: Neutral
  • Carb Impact: Negligible net carbs
  • GI / GL Notes: Fiber-based thickener
  • Common Uses: Sauces, gluten-free baking

How to Use Xanthan Gum

Xanthan gum is a powerful thickener and binder that is commonly used in low-carb cooking and baking. Only a small amount is needed, making it useful for thickening sauces, gravies, soups, and other foods without flour or cornstarch.

Using Xanthan Gum as a Thickener

Start with about 1/8 teaspoon of xanthan gum per cup of liquid for a lightly thickened sauce. For a thicker consistency, gradually increase the amount. Add it sparingly because too much can quickly create a gummy or slimy texture.

For best results, sprinkle the xanthan gum slowly over the liquid while whisking continuously. Avoid adding it in one pile, which can cause clumps that are difficult to remove. An immersion blender can also help distribute it evenly.

Xanthan gum does not need prolonged cooking to thicken. Give the mixture a minute or two to develop its final consistency before adding more.

Using Xanthan Gum in Low-Carb Baking

Xanthan gum can help provide structure and binding in recipes made with almond flour, coconut flour, and other gluten-free or low-carb flours. It is especially useful in breads, pizza crusts, and other recipes where gluten would normally help hold the dough together.

The amount needed for baking depends on the recipe and the other ingredients. Xanthan gum is not a flour replacement, so use recipes developed for it rather than trying to substitute it directly for wheat flour.

Quick Tip: When thickening a sauce or gravy, start with less xanthan gum than you think you need. Whisk it in thoroughly, wait for the mixture to thicken, and add more only if necessary.

Best For

  • Low-carb and keto baking
  • Thickening sauces
  • Replacing gluten structure

Avoid For

  • Overuse (slimy texture)
  • Sensitive digestion (large amounts)
  • Substitution without adjustment

Why Choose Xanthan Gum for Low-Carb Eating

Texture & Structure

  • Provides viscosity without starch
  • Works at very low doses
  • Replaces gluten elasticity

Flavor & Nutrition

  • No sweetness
  • Negligible calories
  • No blood sugar spike

Storage & Shelf Life

Pantry

Store airtight away from moisture.

Cooked

Prepared foods keep normally.

Signs It Has Gone Bad

  • Clumping from moisture
  • Off odor
  • Contamination

Allergy & Dietary Flags

  • Gluten-Free: Yes
  • Nuts: No
  • Nightshade: No
  • Vegan / Vegetarian: Yes

Often paired with guar gum and psyllium husk powder, xanthan gum is a core low-carb thickener.

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