01 -
Set oven to 350 degrees Fahrenheit.
02 -
Mix brownie batter according to package or recipe instructions. Pour into a greased springform pan and bake for 25 minutes. Let base cool completely in the pan.
03 -
Beat cream cheese and granulated sugar in a mixing bowl until smooth. Add eggs one at a time, mixing well after each addition. Blend in sour cream and vanilla extract until fully incorporated.
04 -
Pour prepared cheesecake batter onto the cooled brownie base and smooth the surface with a spatula.
05 -
Place springform pan on a baking sheet. Bake for 45 minutes, or until the center is slightly set but still jiggles. Turn off the oven and allow cheesecake to cool inside with the door closed for 1 hour.
06 -
Refrigerate cheesecake for at least 4 hours or overnight to fully set.
07 -
Warm the hot fudge sauce until pourable, then drizzle generously over the chilled cheesecake.
08 -
Top with whipped cream, sprinkle with multicolored sprinkles, and garnish with maraschino cherries before slicing and serving.