Chocolate Mug Cake

Ingredients (10)

• 2 tablespoons butter
• 3 tablespoons all-purpose flour,
• 2 tablespoons sugar,
• 1 tablespoon cocoa powder
• 1 large egg,
• 1 tablespoon chocolate chips,
• 1 teaspoon pure vanilla extract
• ½ teaspoon baking powder
• pinch of salt
• whipped cream,