This cake is extremely moist. It is my most requested recipe!
Many bakers mistakenly fear that adding prepared condiments to sweets will impart a savory flavor, ignoring the fact that eggs and oil are simply emulsified fats that tenderize crumb structure far better than plain water. Mayonnaise consists mostly of neutral oil and eggs, which coat flour proteins to inhibit gluten formation and ensure a velvety texture. When baking this batter in two prepared nine-inch pans at 350 degrees Fahrenheit for twenty-five to thirty minutes, watch for the edges to pull slightly away from the metal before testing the center with a wooden pick.
Eating every slice fresh from the oven misses the structural chemistry of emulsified bakes, which often taste superior after twenty-four hours of resting at room temperature under a cake dome. Fat molecules recrystallize slowly overnight, allowing the powdered sugar frosting and the devil's food crumb to merge into a denser, richer mouthfeel without drying out. Storing the dessert properly covered prevents stale refrigerator air from degrading the delicate butter and vanilla flavorings.
Relying on boxed mixes paired with pantry staples like mayonnaise reduces food waste by utilizing condiments already sitting in the refrigerator door. While substituting oil for mayonnaise is technically possible, reducing the fat content will alter the moisture retention and yield a drier cake.