Have you seen the three-ingredient peanut butter cookie recipe? It's all ove…

Have you seen the three-ingredient peanut butter cookie recipe? It's all over the Internet–1 cup creamy peanut butter, 1 egg, and 1 cup of granulated sugar. Mix 'em together, bake, and you have a pretty rockin' batch of peanut butter cookies. And they're gluten-free to boot! They were some of the first cookies I ever…