Applesauce (Best Option)
1/4 cup per 1/4 cup onionApplesauce works well as a substitute because it contributes moisture and a mild fruity sweetness that complements banana bread’s flavor profile. The pectin and natural sugars in applesauce help maintain the bread’s moist crumb structure.
To ensure success, use unsweetened applesauce to avoid adding excess sugar. Adjust baking time slightly if the batter feels wetter than usual.
Compared to onion, applesauce enhances the sweetness and moisture of the bread without introducing any savory or pungent notes, making it a harmonious replacement in this context.