β Applesauce (Best Fat-Free Option)
1/4 cup per 1/4 cup onionApplesauce works well as a substitute because it provides moisture and a subtle sweetness that complements the chocolate in brownies. The pectin in applesauce helps bind ingredients, similar to the moisture content onions would add.
When using applesauce, ensure it is unsweetened to avoid altering the sugar balance excessively. Monitor batter consistency as applesauce can make the batter slightly denser.
Compared to onion, applesauce does not add any savory or pungent notes, preserving the intended sweet and rich flavor of the brownies while maintaining a moist texture.