Crust:
1/3 cup butter
1/3 cup butter
1/3 cup firmly packed brown sugar
1 cup all-purpose flour
1/2 cup finely chopped walnuts or pecans
Filling:
1/4 cup sugar
8 oz. cream cheese, softened
1/2 tsp. vanilla
2 T milk
1 T lemon juice
1 egg
Heat oven to 350º. In a small bowl, cream butter and brown sugar until light and fluffy. Lightly spoon flour into measuring cup; level off. Combine flour and walnuts or pecans with creamed mixture. Reserve 1 cup for topping. Press remainder into bottom of ungreased 8" or 9" square pan. Bake for 9-11 minutes or until lightly browned.
In a small bowl, blend sugar and cream cheese until smooth. Add milk, lemon juice, vanilla, and egg. Beat well. Spread over baked crust. Sprinkle with reserved crumb mixture. Bake at 350º for 23-27 minutes or until lightly browned. Cool. Cut into bars. Store in refrigerator.