Preheat oven to 325°F (163°C) and grease a springform pan. Mix graham cracker crumbs, sugar, and melted butter until sandy. Press into the pan, bake 10 minutes, and let cool slightly.
Beat cream cheese and sugar until smooth. Add eggs one at a time, then mix in vanilla and heavy cream.
Pour filling over crust. Wrap pan in foil, place in a roasting pan, and add hot water halfway up the sides. Bake 55–65 minutes until edges set and center jiggles slightly.
Turn off oven, leave cheesecake inside with the door ajar for 1 hour. Remove from water bath, cool, then refrigerate 4+ hours.
Unmold cheesecake, sprinkle sugar evenly, and torch until golden and crisp. Cool briefly before slicing.