When I was a little girl, my mom would take us out to lunch on half-days from school. We would go to our favorite restaurant, and if we were good, we could order a sundae from the dessert menu. My favorite sundae was made with vanilla ice cream, peanut butter, marshmallow, chocolate sauce and a generous sprinkle of peanut butter candies. It was a rare treat, but one that I could never get enough of. Now that I am a grown up, I still love this flavor combination, so I decided to make a cookie inspired by my favorite childhood treat. I started with a pouch of Betty Crocker® peanut butter cookie mix and made it according to the package directions. I added candy coated peanut butter pieces. I used a large ice cream scoop to portion the cookies and placed them on an ungreased cookie sheet. I got 16 cookies out of one pouch. Use a fork to flatten and add a crisscross pattern. Bake for 9 minutes, or until they are almost ready to come out of the oven. Press mini marshmallows into the cookies and put back into the oven for 2 to 3 minutes more. Cool completely on a cooling rack. Make the chocolate drizzle and drizzle over the cookies.