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Marbled Chocolate Banana Bread

Marbled chocolate banana bread with deep golden crumb and dark chocolate ribbons swirled through the batter. This loaf bakes at 350F for a tender, slice-reveal marbled pattern.
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Prep Time 1 hour 5 minutes
Cook Time 55 minutes
Total Time 2 hours
Servings: 8 servings
Course: Snack
Cuisine: American
Calories: 270
Ingredients Equipment Method Notes

Ingredients
  

Banana bread base
  • 3 ripe bananas, mashed
  • 0.33333333333333 cup melted butter
  • 0.75 cup sugar
  • 2 cup flour
  • 1 egg
  • 0.5 cup melted chocolate

Equipment

  • 1 sheet pan

Method
 

Make the batter
  1. Mash the bananas and mix in melted butter and sugar until smooth and cohesive, with no large sugar pockets visible.
  2. Whisk in the egg until the mixture looks glossy and well combined.
  3. Fold in the flour just until no dry streaks remain, stopping as soon as the batter comes together.
Swirl and bake
  1. Pour the batter into a pan and swirl the melted chocolate through the top using a knife to create dark ribbons.
  2. Bake at 350F for 55 min, until the loaf is deep golden and a toothpick inserted in the center comes out with a few moist crumbs.

Notes

For clean swirls, let the melted chocolate cool slightly so it ribbons instead of fully sinking. Store airtight at room temperature for up to 3 days or refrigerate for up to 5 days; freeze slices for up to 3 months. For a dairy-free swap, use plant-based butter.