01 -
Heat your oven to 325°F (165°C). Put parchment paper in a springform pan and place it aside. Mix butter and sugar until they're fluffy and pale. Add in egg, vanilla, baking soda and salt. Slowly mix in flour until everything's just combined. Toss in the sprinkles, then push the dough flat across the bottom of your pan.
02 -
Grab a big bowl and mix cream cheese with sugar until smooth and creamy. Add in the cake mix, vanilla, and eggs, making sure everything gets well blended.
03 -
Pour your filling over the cookie base. Stick it in the oven for 55-60 minutes, until it's almost firm in the middle. Let it chill in the fridge for 4-6 hours before cutting. If you want, add some whipped cream, extra sprinkles, or cookie bits on top.