Peanut Butter Brownie Mug Cake

Ingredients
2 tablespoons peanut butter
3 tablespoons hot cocoa mix
2 tablespoons flour
3 tablespoons low-fat milk
½ tablespoon chocolate chips

2 tablespoons peanut butter
3 tablespoons hot cocoa mix
2 tablespoons flour
3 tablespoons low-fat milk
½ tablespoon chocolate chips