Roll peanut butter cookie dough into 1/2 balls. We prefer the three ingredient recipe - 1 cup peanut butter, 1 cup sugar, and 1 egg. I'm not sure where this recipe originated, I think we found it in a community cookbook a decade or so ago, but I've seen it around on various recipe websites, too.
Bake the cookies. In our case, for 8-10 minutes at 350°F on an ungreased cookie sheet.
As soon as the cookies come out of the oven, press two chocolate chips together, tips down, into each cookie.
Use a butter knife to press, and spread down from the bottom of the chips to a heart point.
Allow the chocolate to cool and harden before stacking the cookies together on a plate, or serve them warm and molten, in a single layer.