Peanut Butter Cupcakes

I love chocolate and peanut butter, and I thought of the cutest idea for a cupcake, so I had to make them and give them to my husband's co-workers.  Delicious chocolate cupcakes with peanut butter frosting, topped off with a mini peanut butter cup, which I frosted with more peanut butter frosting.  My kids thought the "cupcakes on cupcakes" were so cute, and so did I!

Peanut Butter Buttercream

4 large egg whites
1 tsp vanilla extract
1 cup (7 ounces) granulated sugar
pinch salt
4 sticks (16 ounces) unsalted butter, soft, cut into 16 pieces

1/2 cup creamy peanut butter

Place egg whites, vanilla, sugar, and salt in the bowl of your stand mixer and gently whisk over simmering water until sugar dissolves and mixture is 150 degrees, about 3-5 minutes. Place bowl on mixer and whip on high speed 7 minutes. Scrape down bowl. On medium speed, add butter 1 piece at a time, counting 10 seconds between additions. Mixture may look curdled. Increase speed to high and whip until it smooths out. Beat in peanut butter until fully incorporated.