Mix all ingredients together in a medium mixing bowl.
Divide the resulting dough into 12 equal portions (a little larger than a walnut) and place on a baking sheet.
Using a fork, press the cookie to about 1/3 inch thickness.
Bake at 350 for 18-20 minutes.
Cool completely before serving as they fall apart when still warm.
Meanwhile cookies are cooling, prepare frosting. Take a medium mixing bowl and using a hand mixer beat together cream cheese and butter. Slowly add powdered sweetener in until creamy.
Pipe frosting onto bottom of one peanut butter cookie and top with another peanut butter cookie. Continue until all whoopie pies are made. Makes 6 whoopie pies.
Please note that there are 204 grams of sugar alcohol in the entire recipe and should be subtracted to get your net carbs. If you split the recipe into 6 servings per the recipe 34g of sugar alcohol should be subtracted off the nutrition label per serving.Please note that the nutrition data below is provided as a courtesy. We try to be accurate with this information but feel free to make your own calculations.