Banana chocolate chip cupcake

3 large bananas 2/3 cup granulated sugar 150gr 1 teaspoon vanilla extract 1 egg 1/3 cup vegetable oil 50gr 1 cup flour 145gr 1/2 cup cocoa powder 1/2 teaspoon salt 1 teaspoon baking soda 1 teaspoon baking powder 1/2 cup chocolate chips (optional) 1/2 cup peanut butter chips (optional)