Most things with a combination of chocolate and peanut butter, but it's hit or miss depending on the brand. A local ice cream shop sells a sundae called the "Reese's Cup" and it's a layer of peanut butter, a layer of chocolate fudge, some vanilla ice cream, more peanut butter, more ice cream, more fudge, more ice cream, more fudges, and then a bunch of smashed up reese's cups in top and it's the absolute best.