Gooey S’mores Banana Bread with Chocolate and Graham Cracker

Easy S’mores Banana Bread

Banana bread is the perfect use for soft, spotted bananas. This s’mores variation blends the familiar comfort of banana bread with the toasted-marshmallow, chocolate-and-graham-cracker flavor of classic s’mores. The batter comes together in about 10 minutes, bakes in under an hour, and finishes with melted chocolate, toasted mini marshmallows, and broken graham crackers for a fun, summer-ready loaf.

Ingredients Needed for S’mores Banana Bread

This recipe uses mostly pantry staples along with a few s’mores-specific additions. Use the best-quality chocolate you like and overly ripe bananas for the best flavor and texture.

• Butter: Melted unsalted butter.
• Sugar: Granulated sugar (you can swap part for brown sugar if you prefer).
• Sour cream or Greek yogurt: Adds moisture and tenderness.
• Vanilla: Vanilla bean paste or extract.
• Egg: One large, preferably at room temperature.
• Applesauce: Replaces some fat and keeps the loaf moist; substitute extra butter or an extra yolk if needed.
• Bananas: Overripe (mostly brown/black) bananas for sweetness and moisture.
• Dark chocolate: Chopped bar or chocolate chips; some mixed into the batter and some reserved for the top.
• All-purpose flour: A little over three-quarters cup (see recipe for metric amounts).
• Graham cracker crumbs: For mixing into the batter and for topping.
• Baking soda and salt: For proper rise and balanced flavor.
• Mini marshmallows: For toasting on top.

How to Make the Best S’mores Banana Bread

This loaf is straightforward: mix dry ingredients, mix wet ingredients, combine, fold in chocolate, bake, and finish with s’mores toppings. Keep mixing to a minimum once the flour is added so the crumb stays tender.

1. Preheat and prepare the pan: Preheat the oven to 350°F (180°C). Line an 8×4-inch loaf pan with parchment paper, leaving a sling on the long sides, and spray lightly with cooking spray.
2. Mix dry ingredients: Whisk together the all-purpose flour, graham cracker crumbs, baking soda, and salt in a medium bowl. Set aside.
3. Mix wet ingredients: In a large bowl, whisk melted butter with granulated sugar, sour cream, vanilla, egg, and applesauce until smooth.
4. Add the bananas: Mash very ripe bananas with a fork (or whisk until smooth) and stir into the wet mixture. Leave some texture if you like chunkier banana pockets.
5. Combine wet and dry: Fold the dry ingredients into the wet just until no streaks of flour remain. Overmixing will make the loaf dense.
6. Fold in chocolate: Gently fold chopped chocolate or chips into the batter so the pieces are evenly distributed.
7. Bake: Pour batter into the prepared pan and smooth the top. Bake 50–65 minutes (start checking around 50–55 minutes) until the top is deeply golden-brown and a toothpick inserted in the center comes out clean or with a few moist crumbs.
8. Add s’mores toppings: While the loaf is still warm, drizzle melted chocolate over the top, cover with mini marshmallows and additional broken chocolate or graham cracker pieces. Place under the oven broiler for 1–2 minutes or use a kitchen torch briefly to toast the marshmallows—watch closely so they don’t burn.
9. Cool and serve: Let the loaf cool in the pan for about 10 minutes to set, then lift it out using the parchment sling and cool another 10 minutes on a rack before slicing.

Why Are Overripe Bananas Better for Banana Bread?

Overripe bananas are sweeter because their starches convert into sugars as they ripen. That extra sugar adds both flavor and moisture to quick breads. Riper bananas are also softer and mash more easily into a smooth batter, yielding a loaf with a more intense banana taste and tender texture.

If you only have only slightly ripe bananas, the loaf will still work but you may want to increase sugar by 2–4 tablespoons (25–50 g) to compensate for the reduced sweetness.

Note: Some sources suggest softening underripe bananas in a low oven to accelerate ripening. In practice, that technique can make the bananas soft but doesn’t always develop the same sweet, ripe flavor as naturally ripened fruit.

Quick Note on Pan Sizes

This recipe is written for an 8×4-inch loaf pan. If you use a 9×5-inch pan the batter will spread into a flatter loaf and bake faster—expect 40–55 minutes in that case. Adjust bake time and check doneness with a toothpick or cake tester.