Preheat oven to 350 degrees and line two cookie sheets with parchment paper.
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.
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.
Mix 2 C of the Reese baking cups and pieces.
Using a medium cookie scoop, scoop some dough onto your hands and roll into a ball.
Place onto the cookie sheet and lightly press down with your fingers until a thick disk forms.
Repeat steps with remaining dough until all is gone.
Place some of the Reese cups and pieces onto the cookie dough.
Place into the oven and bake for 13-15 minutes or until center doesn’t look gooey.
Allow cookies to cool completely before enjoying!