3. Turn mixer (with butter mixture bowl attached) on low. Add eggs, one at a time, mixing completely. Mix in vanilla extract. Add flour mixture to the wet ingredients and mix until combined. Stir in chocolate chips.
6. When the cookie cups come out of the oven, press one Rolo into the center of each. Let cool completely in pans before removing (let the Rolo re-harden or it will collapse). Cookies should pop out easily with the aid of a knife.