Peanut Butter Buttercream Recipe:Whisk 5 T of flour and 1 cup milk in a small sauce pan over medium heat. When the milk/flour comes to a paste-like consistency, remove from heat and cool to room temperature. Cream 1 cup of butter and 1 cup of granulated sugar. Add the milk/flour mixture and 1 1/2 teaspoons of vanilla extract. Add 1/2 cup peanut butter. Beat on high until fluffy.
here. Smear some of the buttercream on the back of one chocolate cookie and then press with another chocolate cookie to create the cookie sandwhich.