Best Funfetti Cupcake Recipe

Funfetti Cupcakes
2 Start by pre-heating the oven to 400 F and lining 2 cupcake tins with cupcake liners.
3 Mix the dry ingredients in a medium bowl and set aside. On medium speed in a separate bowl and with the paddle attachment, mix butter and white sugar for around 3 minutes, until the butter's color turns into a lighter shade. Add eggs, egg whites, and vanilla extract.Add sour cream and mix
4 With the stand mixer running in low speed, add the flour mixture and milk to the rest of the ingredients, alternating them, starting and finishing with the flour and mixing until just incorporated. It's important that you don't over-mix the batter at this point. Fold in the jimmies with a spatula.
5 Fill the cupcake liners 2/3 full and bake cupcakes for 5 minutes, then lower the oven temperature to 350 F and bake for an additional 9-10 minutes, or until a toothpick inserted in the middle comes out clean. Remove the cupcakes from the cupcake tins and let cool completely over a wire rack before frosting.
Buttercream Frosting
8 Over a large bowl, cream butter until light and fluffy. Gradually, add the sifted powdered sugar, vanilla extract and salt and start mixing in low, then turn the speed up to medium high. Add heavy cream, one Tablespoon at a time; stop when reaching desired consistency.
9 Using a piping bag and a 1M tip, pipe a high swirl of vanilla buttercream into the completely cooled cupcakes and add some extra sprinkles on top.