Preheat oven to 325°F (163°C) and grease a 9-inch springform pan.
Mix sugar cookie crumbs with melted butter and press firmly into the pan to form the crust.
Beat softened cream cheese with sugar until smooth and creamy.
Add eggs one at a time, mixing well after each. Stir in vanilla, sour cream, and heavy cream until silky.
Pour batter over the crust and smooth the top.
Bake 50–60 minutes until the center is set and the edges are lightly golden.
Turn off oven, crack the door, and let cool inside for 1 hour.
Refrigerate at least 4 hours, preferably overnight.
Before serving, top with candy-coated chocolates and a dusting of powdered sugar.