Peanut Butter Stuffed CookiesThese cookies are for peanut butter lovers! They are peanut butter cookies, stuffed with a gooey peanut butter mixture, topped with peanut brittle M&M's. You can swap out the peanut butter cookie exterior with any type of cookie dough you like. I also like a chocolate chip cookie exterior variation. For this recipe, I used a cookie mix, made to its directions on the back. You can get creative with these. These cookies are pretty huge, so you can split one to share with a loved one and watch them ooze!