Cream Cheese Sheet Cake

1 cup plus 2 tablespoons butter, softened
6 ounces cream cheese, softened
2 1/4 cups granulated sugar
6 eggs
3/4 teaspoon vanilla extract
2 1/4 cups cake flour

Frosting
1 cup granulated sugar
1/3 cup evaporated milk
1/2 cup butter
1/2 cup semi-sweet chocolate chips

Cream butter, sugar and cream cheese. Add eggs one at a time beating well after each addition. Beat in vanilla extract. Add flour and mix well. Pour into 15 x 10 x 1 inch jellyroll pan. Bake at 325 degrees F for 30-35 minutes. Cool completely.

Frosting: Combine sugar and milk in saucepan. Bring to a boil over medium heat. Cover and cook for 3 minutes (don?t stir!) Stir in butter and chocolate chips until melted ? cool slightly. Stir and spread over cake.