Very ripe bananas 4 medium
All-purpose flour 2 cups
Unsweetened cocoa powder ½ cup
Eggs 2 large
Buttermilk 1 cup
Vegetable oil ½ cup
Granulated sugar 1½ cups
Vanilla extract 1 tablespoon
Baking powder 2 teaspoons
Baking soda 2 teaspoons
Salt 1½ teaspoons
Chopped walnuts 1 cup
Chocolate chips or chopped chocolate 1–2 cups