Sweet oatmeal cookies are sandwiched between an easy "Marshmallow fluff" frosting to recreate the dessert known as Little Debbie Creme Pies.  These Oatmeal Whoopie Pies (Little Debbie Cookies) come from a Mennonite Cookbook called "Farm House Cooking." Although these have a different filling and had some minor tweaks, you can leave out the frosting all