Preheat oven to 350°F (175°C). Grease a 9×13-inch baking dish.
In a medium bowl, combine graham cracker crumbs, sugar, and melted butter. Press evenly into the bottom of the prepared baking dish.
In a large mixing bowl, beat cream cheese, sugar, and vanilla extract until smooth.
Add eggs one at a time, beating well after each addition.
Fold in chopped Reese’s peanut butter cups and Butterfinger bars. Spread mixture evenly over crust.
Bake for 30-35 minutes or until edges are set and center is slightly jiggly.
Remove from oven and cool completely on a wire rack.
For the ganache, heat heavy cream in a saucepan until it begins to boil. Remove from heat and pour over chocolate chips in a heatproof bowl. Let sit for 1-2 minutes, then stir until smooth.
Pour ganache over cooled cheesecake bars, spreading evenly. Refrigerate for at least 2 hours until ganache is set.
Cut into bars and serve chilled.