Name: Chocolate Banana Muffins
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Yield: 24 muffins
Ingredients: 1/2 cup butter (, softened); 1 cup sugar; 2 large eggs; 3 very ripe bananas (, mashed (1 1/2 cups mashed)); 2 teaspoons vanilla extract; 1 1/2 cups flour; 1 teaspoon baking soda; 1/4 teaspoon salt; 1/2 cup unsweetened cocoa powder; 1 1/2 cups semisweet chocolate chips