Banana Chocolate Chip Sponge Loaf

This compact banana loaf has a lighter, springier structure than conventional banana bread because part of its lift comes from whipped egg whites. A small amount of self-rising flour supports the foam, while ripe banana keeps the crumb moist and chocolate chips provide contrast.

Recipe details

Yield: one 8 1/2-by-4 1/2-inch loaf; 10 slices
Prep: 20 minutes
Bake: 38–45 minutes
Equipment: metal loaf pan, parchment paper, two bowls, whisk, electric mixer, spatula, wire rack, instant-read thermometer

Ingredients

56 grams self-rising flour
1/2 teaspoon baking powder
1/4 teaspoon fine salt
2 medium very ripe bananas, peeled and mashed (about 225 grams)
4 large eggs, separated
2 tablespoons granulated sweetener suitable for baking, or to taste
1 teaspoon vanilla extract
25 grams mini semisweet chocolate chips, divided
Nonstick cooking spray

Method

Heat the oven to 350°F (180°C). Lightly spray the loaf pan and line the base and long sides with parchment, leaving enough overhang to lift out the loaf.
Whisk the flour, baking powder, and salt in a small bowl. In a larger bowl, combine the mashed banana, egg yolks, sweetener, and vanilla until smooth. Stir in the flour mixture only until no dry pockets remain.
With clean beaters, whip the egg whites to firm, glossy peaks. Stir one-quarter of the whites into the banana batter to lighten it. Fold in the rest in three additions, using broad strokes and turning the bowl. Fold in 20 grams of the chocolate chips with the final addition.
Transfer the batter to the pan, level it gently, and scatter the remaining chips over the top. Bake 38–45 minutes. It is ready when the top is browned and springy, a skewer in a chip-free area has no wet batter, and the center reaches at least 190°F (88°C).
Cool in the pan for 15 minutes, then lift the loaf onto a rack. Let it cool completely for at least 1 hour before slicing; the crumb is fragile while hot.

Texture cues and troubleshooting

Use bananas with heavily spotted skins for the clearest flavor, but weigh the peeled fruit. Too much banana can collapse this low-flour loaf. Stop folding once the batter is uniform; vigorous stirring deflates the whites and produces a dense, damp strip near the bottom.

A modest dip as the loaf cools is normal for an egg-foam cake. A deep, wet collapse means it needed longer in the oven or the egg whites were underwhipped. If the top colors too quickly, tent it loosely with foil for the final 10 minutes. Full-size chips may sink, so mini chips work best.

Substitutions and storage

Use dark, milk, or sugar-free chocolate chips by the same weight. Plain flour is not a direct substitute for self-rising flour unless its leavening is adjusted. Keep the cooled loaf airtight at room temperature for 1 day or refrigerate for up to 4 days. Freeze individual slices for up to 2 months and thaw in the refrigerator.

Banana Chocolate Chip Sponge Loaf