Xanthan gum is a natural carbohydrate produced by fermenting glucose with Xanthomonas campestris bacteria (found in cabbage). It's become very popular in gluten free baking where it's used to provide elasticity and stickiness in doughs and batters. It is widely used as a thickener or as an emulsifier, for example to emulsify salad dressings and suspend herbs/spices in the dressing. Soluble in hot or cold water, it's stable over a range of pH and temperatures, and can thicken items with a high alcohol content. It's also compatible with, and stable in, high salt concentrations. It does not alter the flavour or colour of foods.
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