I always see cake moulds at Michael's that allow you to bake a heart inside a cake. I think those are super cute to make. But I really couldn't justify dropping $50 for a mould that I won't be using very often. So, I attempted my own and made these adorable heart-in-cupcakes just in time for Valentine's day. And, I'm going to show you how I did it! All you need to do is find a simple and moist cupcake recipe to use as a base.