Chocolate Mug Cake

Ingredients (10)

• 2 tablespoons white whole wheat flour
• 2 tablespoons unsweetened cocoa powder
• 1/4 teaspoon baking powder
• 1/8 teaspoon kosher salt
• 3 tablespoons milk
• 2 tablespoons nonfat plain Greek yogurt
• 1 1/2 tablespoons pure maple syrup
• 1 tablespoon peanut butter
• 2 tablespoons dark or semisweet chocolate chips
• Optional toppings for serving: vanilla frozen yogurt