This Birthday Mug Cake is such a fun and easy dessert! It is light, fluffy, vanilla mug cake that's bursting with colourful sprinkles and comes together in the microwave. It's the perfect way to celebrate a birthday or truly ANY special occasion!!
In a small bowl, whisk together flour, sugar, and baking powder until combined. Whisk in the milk, butter, and vanilla extract and stir until the batter is smooth. Fold in 1 teaspoon of the sprinkles. Pour the batter into a 14 oz (or larger) microwave-safe mug with straight or high sides. Top with remaining sprinkles if desired!
Microwave on high for 1 ½ - 2 minutes (give or take 30 seconds depending on the strength of your microwave, ours took 2 minutes), or until the cake is done to your liking. Allow the cake to cool for a couple of minutes before serving, the mug will be hot!