culinary foam
Quick Summary
Culinary foam is a dispersion of gas bubbles within a liquid medium, often stabilized by proteins like those found in egg whites or gelatin. This process is used to create light, airy textures in foods such as meringues, marshmallows, and whipped cream.12
In baking, egg white proteins foam readily when whipped, creating a structure that needs support from other ingredients like flour gluten to maintain its form during baking. While egg yolk and whole egg foams are also used, they form air-in-oil emulsions that are denser and more prone to collapse than pure protein foams.2
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