"These easy-to-make milkshake clones from Sonics fountain are no longer available at the 3,342-unit drive-in burger chain, but you'll always have this clone. The straight peanut butter version is way delicious if you're into peanut butter. And then, when you add a little fudge to the recipe for the second clone, you've got what tastes like a cold, creamy Reeses Peanut Butter Cup. Good stuff, man...."