Step 1: Preheat the Oven - Start by preheating your oven to 350°F (175°C) for even baking.
Step 2: Prepare the Baking Pan - Line a 9x13-inch baking pan with parchment paper and lightly grease it.
Step 3: Make the Brownie Batter - Melt the butter and dark chocolate, then mix with sugars and vanilla. Add eggs and flour.
Step 4: Fold in the Peanut Butter Cups - Gently mix in half of the chopped mini Reese's peanut butter cups.
Step 5: Prepare the Cheesecake Layer - Beat cream cheese and butter, then add egg, sugar, salt, vanilla, and peanut butter.
Step 6: Assemble the Brownies - Layer half of the brownie mix, then the cheesecake, and top with the remaining brownie mix.
Step 7: Add Toppings - Sprinkle remaining chopped mini Reese's and chocolate chips on top.
Step 8: Bake - Bake for 30-35 minutes until a toothpick comes out with moist crumbs.
Step 9: Cool and Serve - Cool for 30 minutes, lift out using parchment, cut, and enjoy!
