Extra-Fudgy Dark Chocolate Banana Bread Muffins with Walnuts

Sophia Li
Sophia Li
Published: February 18, 2026
Tags: Chocolate, Dessert, Baking, Breakfast, snack, Banana, Muffins

Banana Muffins

Fudgy dark chocolate banana muffins studded with walnuts and a sprinkle of sea salt—pure comfort.

Prep Time:15 minCook Time:20 minTotal Time:35 minServings:12Difficulty:Easy

These muffins are the sort of recipe I make when ripe bananas need a purpose and chocolate cravings demand a remedy. They’re extra fudgy thanks to dark cocoa and generous chopped dark chocolate, but they still have that banana-bread warmth — tender crumb, caramelized edges, and crunchy walnut bites throughout.

They come together quickly and are great for breakfast, an afternoon pick-me-up, or dessert with a scoop of ice cream. I love finishing them with a tiny pinch of sea salt to highlight the chocolate; they keep well and even taste better the next day.

Nutrition (per serving)

Calories:310 kcal
Protein:4 g
Carbs:38 g
Fat:15 g

Directions

  1. 1
    Paper-lined muffin tin ready for chocolate banana batter

    Preheat the oven to 375°F and line a 12-cup muffin tin with paper liners.

  2. 2
    Dark cocoa flour mixture whisked in a bowl

    Whisk together the flour, cocoa powder, baking soda, baking powder, and salt in a large bowl until evenly combined.

  3. 3
    Mashed banana wet mixture whisked until smooth

    In a separate bowl, whisk the granulated sugar, brown sugar, eggs, mashed bananas, melted butter, Greek yogurt, vanilla, and espresso powder until smooth.

  4. 4
    Banana mixture folded into dark cocoa dry ingredients

    Pour the wet ingredients into the dry ingredients and gently fold with a spatula until just combined — don’t overmix.

  5. 5
    Chocolate chunks and walnuts folded into dark muffin batter

    Fold in 4 oz of the dark chocolate and the chopped walnuts, reserving a handful to sprinkle on top of the muffins.

  6. 6
    Chocolate banana batter portioned into lined muffin cups

    Spoon the batter into the prepared muffin cups, filling each about 3/4 full. Top each with remaining chocolate and walnuts.

  7. 7
    Baked chocolate banana muffins checked with a toothpick

    Bake for 18–22 minutes, rotating the pan halfway through, until a toothpick inserted into the center comes out with a few moist crumbs.

  8. 8
    Coarse sea salt sprinkled over hot chocolate muffins

    Remove from the oven and immediately sprinkle each muffin with a tiny pinch of coarse sea salt.

  9. 9
    Dark chocolate banana muffins cooling on a wire rack

    Let the muffins cool in the tin for 5–7 minutes, then transfer to a wire rack to cool completely.

  10. 10
    Cooled chocolate banana muffins in an airtight container

    Store cooled muffins in an airtight container at room temperature for up to 3 days, or freeze for longer storage.

Ingredients

  • All-purpose flour:1 3/4 cups
  • Unsweetened dark cocoa powder:1/2 cups
  • Baking soda:1 tsp
  • Baking powder:1/2 tsp
  • Salt:1/2 tsp
  • Granulated sugar:3/4 cups
  • Light brown sugar, packed:1/2 cups
  • Mashed ripe bananas:1 1/2 cups
  • Eggs:2 pieces
  • Unsalted butter, melted:1/2 cups
  • Plain Greek yogurt:1/3 cups
  • Vanilla extract:1 tsp
  • Espresso powder (optional):1 tsp
  • Dark chocolate chips or chopped dark chocolate:6 oz
  • Chopped walnuts:1/2 cups
  • Coarse sea salt (for sprinkling):1/4 tsp
  • Paper muffin liners:12 pieces

Tips & Notes

  • Use very ripe bananas (lots of brown spots) for the best banana flavor and natural sweetness.
  • If you don’t have Greek yogurt, sour cream or buttermilk works fine — they keep the muffins tender and moist.
  • Don’t overmix the batter; a few streaks of flour are okay and help ensure a tender crumb.
  • For extra fudginess, press a small piece of chopped dark chocolate into the top of each muffin before baking.