Preheat oven to 350 degrees and add cupcake liners to a mini cupcake pan.
In the bowl of a stand mixer fitted with the paddle attachment or a large mixing bowl, beat together the cake mix, egg whites, buttermilk, vanilla and oil.
Mix until smooth, but do not overmix.
Fold in sprinkles carefully so colors don’t run. Do not overmix.
Evenly divide among lined cupcake wells.
Bake at 350 degrees for 12-14 minutes or until a toothpick inserted in the center comes out clean
Cool completely on a wire rack.
Decorate with buttercream frosting, and add sprinkles or other decorations.
If you've tried this recipe, come back and let us know how it was in the comments or ratings!
*Sift cake mix before adding to reduce clumps, cutting back on stirring and ensuring you have the most moist cupcakes ever!**Eggs: You can also use whole eggs, the batter will be a little more yellow.***You can use regular vanilla extract, but it will tint the batter brown. You can also omit the vanilla.