Lemon Sheet Cake

Ingredients
1 package (18-1/4 ounces) lemon cake mix
4 eggs
1 can (15-3/4 ounces) lemon pie filling
1 package (3 ounces) cream cheese, softened
1/2 cup butter, softened
2 cups confectioners' sugar
1-1/2 teaspoons vanilla extract
Directions
In a large bowl, beat the cake mix and eggs until well blended. Fold in pie filling.
Spread into a greased 15-in. x 10-in. x 1-in. baking pan. Bake at 350° for 18-20 minutes or until a toothpick inserted near the center comes out clean. Cool on a wire rack.
In a small bowl, beat the cream cheese, butter and confectioners' sugar until smooth. Stir in vanilla. Spread over cake. Store in the refrigerator. Yield: 30-35 servings.