For a recent work birthday, I needed to make something that involved chocolate and peanut butter. I'd started to feel that over the years, I'd done all the varieties of things I could make (cakes, pies, ice creams), so this year, I opted for cupcakes. When I perused Julie Hasson's 125 Best Cupcake Recipes, I ended up deciding to make all four of the peanut butter-chocolate cupcake recipes. Each one made a dozen cupcakes, so I was sure to have leftovers. I made a double batch of her peanut butter frosting for half of the cupcakes; for the other half, I used a chocolate buttercream.