Preheat oven to 350 degrees and spray a 9x13 baking dish with pam baking spray or line with parchment paper
Using a large bowl, beat until combined the cake mix, melted butter, and egg
Press evenly into the baking dish
Using a large bowl, beat the cream cheese and powdered sugar until combined and smooth
Beat in the eggs, lemon zest, lemon juice, and lemon extract until combined
Beat in the melted butter until combined
Pour the batter on top of the crust
Bake in the oven for 35-45 or until a light golden brown
Remove from oven and allow to cool completely
Dust with powdered sugar and cut into bars and enjoy!