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I mixed a cup of real mayonnaise into my dry brownie mix instead of vegetable oil. 35 minutes later,
Mayonnaise’s success in this recipe can be attributed to its composition. The oil provides the necessary fat, while the eggs add structure and moisture. The vinegar or lemon juice, present in small amounts, likely evaporates during baking, leaving no noticeable flavor.
Food science supports the idea of mayonnaise as a viable substitute in baking, especially in recipes calling for both oil and eggs. It acts as a tenderizer, enhancing moisture while maintaining the integrity of the baked goods.