This recipe came from me liking peanut butter, but peanut butter cookies don't stay chewy enough for me. Since I love oatmeal cookies, I sort of combined the 2 flavors and here's what happened. When I first met my husband, he swore he didn't like oatmeal cookies. Now around Xmas, he knows I'll start baking and he asks for these every year! I have served them with a bit of Nutella inside like a sandwich, and I also took them to an office party with peanut butter and jelly spread inside. If you do fill them, put them in the fridge until ready to serve. But I will admit, my favorite is just these cookies and a big old glass of milk. Hope you like them too!