Preheat the oven 350˚F. Line a muffin pan with paper liners.
For the crust: In a medium bowl, mix together the graham cracker crumbs, butter and 2 tablespoons of white sugar until fully combined. Divide the mixture evenly into the bottom of each paper cup, and set aside.
For the cheesecake: In a separate bowl, beat together the cream cheese, ½ cup sugar and flour until light and fluffy. Beat in the egg and vanilla until fully combined.
Place the peanut butter cups in the center of each muffin cup and pour the cream cheese mixture on top.
Bake for 15-18 minutes, or until the center is set. Let cool in pan for 5 minutes then let completely on wire racks. Refrigerate for at least 2 hours before serving.