Preheat oven to 350℉ and prepare line a 9x13 baking dish with parchment paper
Add the butter to a large mixing bowl, and melt in the microwave
Add granulated sugar and white sugar, and mix until well combined
Stir in peanut butter and vanilla extract
Add eggs, and mix until fully combined
Mix in flour, baking powder, salt and cinnamon until just combined
Stir in 1¾ cups chocolate chips
Evenly spread mixture in prepared baking dish
Top with remaining ¼ cup chocolate chips and mini peanut butter cups
Bake for 20-25 minutes, or until dough no longer looks greasy and a toothpick inserted comes out clean
Remove from oven, and allow to cool slightly-about 15 minutes-before removing from pan
Slice into squares, and store in an airtight container