Leave time for each layer in the process to set, and you’re good to go. Make the base crust (“shortbread”) layer, which bakes in just 10 minutes. Let it cool, then spread on your “caramel” layer. This takes longer to set. Ideally, refrigerate the caramel layer overnight for a good hard set. At a minimum, refrigerate it for two hours before adding the chocolate layer (which is a snap to make in microwave). Though the original recipe suggests placing this in the freezer if you’re in a hurry to set the caramel, don’t. It will change the texture so that ice can form at the top of the caramel. This will become watery at room temp. Once all assembled and firmed up in your fridge, it’s fine to store these Paleo Chocolate Tahini Millionaire Bars in your freezer if you like!