Step 1: Using a medium microwave safe bowl, melt the butter. Mix in the pumpkin puree, both sugars, molasses and vanilla extract into the melted butter until combined.
Step 2: In another bowl, whisk together the flour, pumpkin pie spice, baking soda, and salt. Gradually mix in your dry ingredients into the wet until combined.
Step 4: Place onto the cookie sheet and lightly press down with your fingers until a thick disk forms. Place some of the Reese cups and pieces onto the cookie dough.