Preheat oven to 350°F. Coat a 9-inch baking pan with nonstick cooking spray.
In a colander, drain and rinse beans.
In a large bowl, whisk eggs, oil and vanilla with a fork. Add beans and mash with fork until beans are barely visible (this can take 5 or more minutes of mashing). Stir sugar and cocoa, and blend with a rubber spatula until mixed. Stir in chips or nuts if using.
Pour the batter into the baking pan. Bake until a knife inserted in the center of the brownies comes out clean, 25 to 30 minutes. Let cool completely before cutting into 16 squares.
Printed from EastTexasFoodBank.org