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close up shot of 3 slices of marbled banana bread leaning against the loaf
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4.65 from 34 votes

Marbled Chocolate Banana Bread

This Marbled Chocolate Banana Bread is a super moist banana bread with swirls of chocolate, simple to make and it's a true decadent treat!
Prep Time10 minutes
Cook Time1 hour
Total Time1 hour 10 minutes
Course: Bread, Breakfast, Dessert
Cuisine: American
Keyword: banana bread, chocolate banana bread, marbled chocoalte banana bread
Servings: 12
Calories: 272kcal



  • Prepare your oven and loaf pan: Preheat oven to 350 F degrees. Spray a 9x5-inch loaf pan with cooking spray or grease it with butter.
  • Combine dry ingredients: In a medium bowl add the flour, baking soda, salt and mix together; Set aside.
  • Combine the wet ingredients: In another large bowl, add sugar and butter and beat with a mixer at medium speed until well incorporated. Add eggs, and sour cream; beat until blended then stir in mashed bananas. 
  • Combine the dry and wet: Add flour mixture; beat at low speed just until moist.
  • Melt chocolate chips: Place chocolate chips in a medium microwave-safe bowl, and microwave at high for 1 minute or until almost melted. A minute was enough for me, stir until the chocolate is smooth. 
  • Make chocolate batter: Add 1 cup of the batter to the chocolate and stir so that it's well combined.
  • Spoon into loaf pan: Spoon the white batter first in the greased pan, then the chocolate batter, and swirl batters together with a knife. Or first spoon a layer of white batter, then a layer of chocolate batter, then white batter, then chocolate and if there's any white batter add it on top.
  • Bake: Bake for about 1 hour to 1 hour and 15 minutes or until an inserted toothpick in the middle of the bread comes out clean.
  • Cool and serve: Cool for 10 minutes in the pan, then remove from pan and continue cooling on a wire rack. Slice and serve.



  1. Ugly brown bananas make the best banana bread. However, make sure you don’t use fermented bananas, or those where the peel is split.
  2. Storing: Wrap banana bread in plastic wrap while still a bit slightly warm, but not hot. This will keep it from drying out overnight. 


Serving: 1slice | Calories: 272kcal | Carbohydrates: 44g | Protein: 3g | Fat: 9g | Saturated Fat: 5g | Cholesterol: 45mg | Sodium: 197mg | Potassium: 147mg | Fiber: 1g | Sugar: 25g | Vitamin A: 275IU | Vitamin C: 2.6mg | Calcium: 26mg | Iron: 1.3mg