What is aquafaba

Overview

Aquafaba is the liquid byproduct from canned chickpeas that has emerged as a revolutionary egg substitute in vegan and plant-based cooking. The term 'aquafaba' combines the Latin words 'aqua' (water) and 'faba' (bean), literally meaning bean water. What was previously discarded as waste has become a valuable cooking ingredient due to its unique biochemical properties. The liquid contains water, starch, and soluble proteins extracted from chickpeas, creating a composition that mimics the functional properties of egg whites in many culinary applications.

Composition and Properties

Aquafaba's magic lies in its chemical composition. The liquid contains dissolved proteins, starches, and minerals that create an emulsifying and binding effect similar to eggs. When whipped, the proteins in aquafaba create a stable foam structure, trapping air and building volume much like whisked egg whites. The liquid's viscosity and protein content allow it to bind ingredients, provide structure, and create leavening in baked goods. These properties make it suitable for both liquid-replacement applications and whipped applications where eggs traditionally provide volume and stability.

Sourcing and Preparation

Canned chickpea liquid is the most convenient source of aquafaba. Simply drain a can of chickpeas (typically 15 ounces yields approximately 3-4 tablespoons of liquid) and reserve the liquid. The aquafaba is immediately usable in its raw form for baking or can be whipped. Alternatively, homemade aquafaba can be made by cooking dried chickpeas from scratch, though this liquid is typically thinner and may require reduction through simmering to achieve proper consistency. Chickpea broth from cooking dried chickpeas often has better structure than canned varieties due to higher starch and protein concentration.

Culinary Applications

Aquafaba works in numerous recipes traditionally requiring eggs. Whipped aquafaba can create meringues, mousses, pavlovas, and mousses with results nearly indistinguishable from egg-based versions. As a liquid binder, it works in cakes, cookies, brownies, and quick breads at a 3-tablespoon-per-egg ratio. It can be used in vegan mayonnaise and other emulsified sauces, in smoothies and protein drinks, and even in pancake batter and waffle batter. Some bakers successfully use aquafaba in angel food cakes, which traditionally require whipped egg whites. The applications continue to expand as bakers experiment with the ingredient.

Whipping Techniques

To whip aquafaba effectively, add 1/8 teaspoon of cream of tartar or lemon juice per 3 tablespoons of aquafaba to provide additional stability. Using a stand mixer or hand mixer on medium-high speed, whip for 5-10 minutes until stiff peaks form. Initial whipping produces a foamy liquid, followed by soft peaks, and finally stiff peaks similar to whipped egg whites. For best results, use aquafaba at room temperature in a clean, dry bowl and beaters; any grease or oil will prevent proper foam formation, just as with egg whites.

Nutritional Considerations

Aquafaba provides modest nutritional value with approximately 2-4 grams of protein per 3 tablespoons and some carbohydrates from dissolved starch. While less protein-dense than whole eggs, aquafaba's functional properties make it valuable for plant-based cooking regardless of nutritional contribution. The ingredient is naturally vegan, gluten-free (if using certified gluten-free chickpeas), and allergen-friendly for those avoiding eggs, dairy, and other common allergens.