Whenever, I have leftover filling in the fridge, I go look for thumbprint cookie recipe. They are small, pop-in your mouth thumbprint cookies. I made two variation Chocolate Thumbprints & Lemon Thumbprints. Both are easy to make by hand and each one is topped with dollop of lemon curd and sticky chocolate frosting, that has been in my fridge for quite sometime. These are the perfect for those leftovers that couldn't quite cover an entire cake or something and nobody ever knows that the fillings were made to top other dessert.