Cream cheese lemon bars

I love lemon bars ! I cannot wait to make these ones that i found on Beths blog.

1 box lemon cake mix
1/3 c butter, softened
1 egg
8 oz cream cheese, softened
1 cup powdered sugar
1/2 lemon rind grated
2 T lemon juice or 1/2 fresh lemon squeezed
2 eggs
1 t vanilla

In a mixing bowl, blend dry cake mix, butter and 1 egg. Press into a 9 x 13 ungreased pan.

Beat the cream cheese until smooth. Gradually blend in the powdered sugar. Stir in lemon peel and lemon juice until smooth. Reserve 1/2 c of this mixture and refrigerate it for later use.

Beat the remaining 2 eggs, add the vanilla and then beat this mixture into the remaining cream chesse mixture until well blended. Spread over the cake mixture.

Bake at 350 until set---about 25-30 minutes. Cool completely. Spread the reserved cream cheese mixture onto the bars. Refigerate until firm. Cut into squares and serve.