1 (18.25 ounce) box lemon cake mix
8 tablespoons (1 stick) butter, softened
8 ounces cream cheese, at room temperature
2 cups confectioners' sugar
Combine cake mix, 1 egg and butter. Spoon into ungreased 9 x13-inch baking pan. Press evenly into bottom of pan.
Combine cream cheese, 2 eggs and confectioners' sugar and beat at least 3 minutes or until smooth. Spread over cake batter. Bake at 350 degrees F for 45 minutes. Cool and slice into squares before serving.