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Ultimate Fudgy Chunky Monkey Brownies with Banana Swirls

Close-up of a rich, fudgy chunky monkey brownie held in hand, topped with a banana slice and walnuts.
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Make dense, chewy brownies loaded with banana, walnuts, and multiple types of chocolate chips. This recipe delivers rich dark chocolate walnut bars with a gooey texture.

Ingredients

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  • 1 cup (2 sticks) unsalted butter, melted
  • 1 1/2 cups granulated sugar
  • 1 cup packed light brown sugar
  • 4 large eggs, room temperature
  • 1 tablespoon vanilla extract
  • 3/4 cup unsweetened cocoa powder
  • 1 cup all-purpose flour
  • 1/2 teaspoon salt
  • 1/2 cup chopped walnuts or pecans
  • 1 cup semi-sweet chocolate chips
  • 1/2 cup dark chocolate chips
  • 1 ripe medium banana, mashed well
  • 1/2 ripe medium banana, thinly sliced for topping

Instructions

  1. Preheat your oven to 350°F (175°C). Line a 9×13 inch baking pan with parchment paper, leaving an overhang on the sides for easy removal. Lightly grease the paper.
  2. In a large bowl, whisk together the melted butter, granulated sugar, and brown sugar until fully combined.
  3. Whisk in the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
  4. In a separate bowl, whisk together the cocoa powder and flour. Gradually add the dry ingredients to the wet ingredients, mixing only until just combined. Do not overmix.
  5. Gently fold in the chopped nuts and the semi-sweet and dark chocolate chips.
  6. Take the mashed banana and gently swirl it into about two-thirds of the batter. Leave the remaining one-third plain for a layered effect.
  7. Spread half of the batter into the prepared pan. Layer the remaining plain batter over the top.
  8. Arrange the thin banana slices evenly over the top layer of batter.
  9. Bake for 30 to 35 minutes. A toothpick inserted near the edge should come out with moist crumbs, but the center should still look slightly underdone for a fudgy texture.
  10. Let the brownies cool completely in the pan on a wire rack before lifting them out using the parchment overhang and cutting into squares.

Notes

  • For the fudgiest results, use high-quality cocoa powder and avoid overbaking.
  • If you prefer a less cakey texture, reduce the flour by one tablespoon.
  • Cooling completely before cutting prevents the gooey centers from falling apart.

Nutrition

Find it online: https://pureplatepath.com/chunky-monkey-brownies-recipe-banana-walnut/