Step 1

Preheat your oven to 350 degrees F. Generously grease or line a standard 9"x13" baking pan and set aside.

Step 2

Melt 1 stick of the butter and set aside.

Step 3

In the bowl of a stand mixer fitted with the paddle attachment or in a large bowl if using a handheld mixer, mix the cake mix, 1 teaspoon of the vanilla extract, 1 egg and the 1 stick of melted butter together on medium speed. The mixture will be thick and almost putty-like.

Step 4

Transfer the batter to your prepared pan and spread it evenly on the bottom of the pan. Set aside. Do not wash the mixing bowl.

Step 5

Melt the remaining 1 stick of butter and set aside.

Step 6

In the same mixing bowl, beat the cream cheese on medium speed until it is smooth and creamy. Then add the remaining 2 eggs, remaining 1 teaspoon of vanilla extract, and melted butter. Continue mixing on medium speed until everything comes together.

Step 7

Turn the mixer to low and slowly add in the powdered sugar until everything just comes together. Then turn the mixer to high and beat until everything is completely smooth.

Step 8

Pour this on top of the other batter and smooth the top.

Step 9

Bake in your preheated oven for 45-50 minutes or until the top is golden brown and the center is no longer jiggly.

Step 10

Allow the cake to cool before slicing and serving.