Black Bean and Walnut Brownies



  • 1 (15 1/2 oz) can black beans, rinsed and drained
  • 1/2 cup olive oil
  • 2 large eggs
  • 1/4 cup unsweetened cocoa powder
  • 1/4 cup agave or maple syrup
  • 1 teaspoon vanilla extract
  • 1/2 cup mini chocolate chips, divided into two 1/4 cup portions
  • 1/3 cup white whole wheat flour
  • 1/2 teaspoon baking powder
  • 1 teaspoon canola, coconut, or walnut oil
  • 1/4 cup chopped walnuts


  1. Preheat oven to 350 degrees. Lightly grease 9" x 9" square baking pan with oil.
  2. In a blender, purée black beans in olive oil. Then add eggs, cocoa, agave/maple sugar, and vanilla. Melt half of the chocolate chips and add to the blender. Blend until smooth.
  3. In a small bowl, whisk together the flour and baking powder. Add to the blender and pulse until just incorporated.
  4. Stir in the remaining chocolate chips and pour into prepared pan. Sprinkle walnuts on top.
  5. Bake about 20 minutes, until surface looks somewhat matte.
  6. Let cool at least 15 minutes before cutting and removing from the pan.


12 servings

Nutrition Tip

Black beans are a great way to add fiber and plant-based protein to a traditional brownie recipe. The bland flavor of black beans allows them to take on the flavor of other recipe ingredients such as cocoa powder, chocolate chips, and vanilla extract. Beans also give these brownies a smooth consistency.

Preparing dried beans is a great way to save money in your grocery budget. Buying in bulk saves money because it allows you to buy only the amount you need and pay by the pound.

Source: Nicolette Maggiolo is a volunteer at Dana-Farber and a student in the dietetics program at Boston University. She enjoys collaborating with various health professionals and looks forward to a career as a clinical Registered Dietitian. Nicolette aspires to help people embrace healthy lifestyle behaviors as a partner in disease prevention and recovery.

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Delicious and Nutritious Recipes

Our recipes are developed by Dana-Farber's staff of registered and board-certified dieticians. They feature a varied selection of dishes – including a few sweet treats you don't need to feel guilty about.


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Our nutrition experts help patients follow a healthy diet during and after cancer treatment. They have special training in oncology and nutrition.