Pre-heat oven to 350 degrees.
In a large, microwave safe bowl melt butter. Add in sugars and stir to combine.
Add in eggs, one at a time. Stir to combine. Add in vanilla and stir to combine.
Add in baking soda and flour. Stir until just combined.
Fold in chocolate chips and Reese's Pieces.
Grease cookie sheets or line them with parchment.
Scoop tablespoons of dough onto a cookie sheet. Press 3-4 candy eyes into your balls of dough.
Bake at 350 degrees for 8-12 minutes or until the bottoms are just starting to turn brown. My family prefers cookies on the gooier side, so I tend to try and err on the side of caution by pulling them out a bit early. However, if you like crunchy cookies, leave them in a minute or two longer.