Xanthan gum promotes a good rise in gluten-free baked goods. Add 1/2 teaspoon xanthan gum per cup of gluten-free flour in yeast bread or pizza recipes; 1/4 teaspoon per cup in cake or muffin recipes. Blend with dry ingredients to prevent clumping. Xanthan gum also thickens and stabilizes salad dressings and dairy products, including ice cream. For best results, use 1/4 teaspoon xanthan gum per cup of liquid called for in the recipe. Whip in a blender with liquid to prevent clumping.