3.5ozwhite chocolate barmelted (I used Green & Blacks)
2 ½cupcake flour
1Tablespoonbaking powder
½teaspoonkosher salt
For the White Chocolate Frosting:
1cupunsalted buttersoftened
2cupspowdered sugar
3.5ouncewhite chocolate barmelted
1 ½Tablespoonswhole milk
For the Peanut butter Frosting:
1cupunsalted buttersoftened
2cupspowdered sugar
⅓cupcreamy peanut butter
1 ½Tablespoonswhole milk
Instructions
For the cake, whisk together the egg whites, and 1/4 cup of the milk in small bowl until slightly combined. Set aside.
In mixing bowl, beat butter and sugar for 2 minutes on medium. Add in dry ingredients and mix until combined. Slowly in a steady stream add in the egg white mixture. Beat in remaining milk and melted white chocolate bar.
Fill cupcake liners half full with batter and bake in a 350 degree oven for about 15 minutes. Remove and cool in pan 5 minutes then transfer to a wire rack. Cool completely before frosting.
For the frosting, beat butter 5 minutes until it becomes pale in color. Add sugar, melted white chocolate and whole milk. Beat an additional 5 minutes until fluffy. Fill a disposable pastry bag with frosting (no tip on the end). Set aside.
For PB frosing, beat butter 5 minutes until pale in color. Add sugar, peanut butter and whole milk. Beat an additional 3-5 minutes until fluffy. Fill a disposable pastry bag with frosting (no tip on end).
Take a LARGE pastry bag and add both types of frosting, making sure the ends of each bag go down to the bottom. Using a 6S tip, pipe onto cupcakes. The peanut butter frosting is very light, so it's hard to see the swirl. That's okay, you will taste it!!
Notes
Use a 6S tip to make the frosting look like the cupcakes in these pictures.
The peanut butter frosting is light so you won't see the swirl. That's okay--you'll taste it in each bite!
To get the perfect sized cupcake, fill the liners only half full. This ensures even baking and a flat top perfect for holding all of that extra delicious frosting.
Garnish with a mini white chocolate peanut butter cup for a pretty (and tasty) finishing touch!