Kit Kat Cheesecake Brownies

!Brownie

or 8 tablespoons) unsalted butter, room temperature

unsweetened chocolate, chopped

unsweetened cocoa powder

granulated sugar

salt

vanilla extract

egg, room temperature

all-purpose flour

individual Kit Kat wafers (5 regular-sized Kit Kat bars)

!Cheesecake

cream cheese, softened

granulated sugar

eggs, room temperature

fresh lemon juice

vanilla extract