Yellow cake is the classic birthday cake, and a perfect blank canvas on which to paint a sweet celebratory picture. Eat it as is, or fold in anything you like — chocolate chips, candies, nuts, fruits — to create a personalized mug cake statement. Makes 2 mug cakes INGREDIENTS 2 tablespoons unsalted butter 1 large egg 2 tablespoons milk 1 teaspoon pure vanilla extract 1/4 cup granulated sugar 6 tablespoons (1/4 cup plus 2 tablespoons) self-rising flour Pinch of kosher salt Topping Ideas: Chocolate frosting, vanilla frosting, whipped cream, rainbow sprinkles, chocolate jimmies, or colored sugar crystals. PREPARATION Place the butter in a large mug and microwave it for 20 to 30 seconds until melted. Add the egg and whisk it in with a fork. Stir in the milk, vanilla, and sugar. Add the flour and salt. Beat the batter until smooth. Divide the batter between two mugs. Microwave separately for 1.5 to 2.5 minutes each until risen and firm. 2. Red Velvet Mug Cake
