½ cup rainbow jimmies-style sprinkles (not nonpareils—they bleed!)
Whipped Birthday Frosting (optional but recommended!)
1 cup cold heavy cream
2 tbsp powdered sugar
¼ tsp vanilla extract
Extra sprinkles for topping
Instructions
Step 1 — Make the Crust : Preheat oven to 325°F / 160°C. Mix crushed cookies, sugar, and melted butter. Press firmly into a 9-inch springform pan. Bake 8–10 minutes, cool slightly.
Step 2 — Prepare the Filling : Beat cream cheese and sugar until super smooth. Add sour cream and vanilla; mix until combined. Add cornstarch. Add eggs one at a time, blending slowly (don’t overmix!). Gently fold in rainbow sprinkles.
Step 3 — Bake : Pour filling over crust. Place pan in water bath (optional for no cracks). Bake 55–65 minutes — edges set, center slightly wobbly. Cool in oven with door cracked 1 hour. Refrigerate 4 hours or overnight.
Step 4 — Frost u0026 Decorate : Whip cream + powdered sugar until fluffy. Pipe or spread onto chilled cheesecake. Shower with extra sprinkles!