These cake batter waffles taste just like birthday cake, but in waffle form! They're perfect for birthdays, or just any time you need a special breakfast!
Add the butter and milk to a small bowl or measuring cup, and heat in the microwave for one minute and thirty seconds, or until the butter is melted. Whisk in the vanilla and set aside.
In a large bowl, beat the eggs until fluffy. Add the milk mixture and stir to combine. Add the flour, cake mix, baking powder, salt, and sugar, and mix until just combined (small lumps are ok). Let sit five minutes.
While the batter is resting, preheat your waffle iron. Stir in the sprinkles, then add the batter and cook according to your waffle maker's directions. For my belgian waffle maker, 1 cup of batter cooked for 4 minutes was perfect.