Reduce oven heat to 325 degrees Fahrenheit.
Using an electric mixer, beat the cream cheese until smooth in a large bowl.
Add in the sugar, heavy whipping cream, and vanilla, and beat until combined.
Add in the eggs, one at a time, beating lightly between each addition until just combined. It's very important not to overbeat the batter once the eggs are added; however, you can beat for as long as you want before this addition.
Stir in the chopped candy bars, chocolate, fudge, or whatever other ingredient you'd like.
Pour the batter into the cooled crust.
Bake for anywhere between 30-60 minutes or until set. You will know it's set once it's slightly golden and the middle is only slightly jiggly. The key here is to keep a close eye on it after the first 30 minutes, you don't want to overbake it, but you definitely don't want to underbake it! (*see notes)
Keeping the cheesecake in the pan, let it cool completely on a wire rack, then move it to the freezer and let it chill for at least 3 hours.