CTE Culinary State Practice Test 2026 - Free Culinary Practice Questions and Study Guide

Emulsification is what ties mayo and aioli together: a stable mixture where oil droplets are dispersed in a water-based phase. The essential trio is egg yolk, oil, and an acid. Egg yolk supplies lecithin, a powerful emulsifier that coats oil droplets and prevents them from coalescing, giving that smooth, creamy texture. Oil provides the fat that forms the body of the emulsion. The lemon juice adds acidity, which not only brightens flavor but also helps the emulsion stay balanced and stable by influencing the proteins in the yolk and the overall texture. Butter isn’t used here because it introduces dairy fat and water that can break a mayo-style emulsion, and water on its own doesn’t form the emulsion. While vinegar is a valid acid in many recipes, traditional mayo and aioli are typically described with lemon juice, making this combination the best representation of the traditional components.