1/3 c. butter
1 1/2 c. graham cracker crumbs
1/4 c. flour
2 tbsp. sugar
1 (8 oz.) pkg. cream cheese
1 can sweetened condensed milk
1 c. sour cream
2 eggs, slightly beaten
1 tsp. vanilla

Combine butter, crumbs, flour and sugar and mix until crumbly - reserve 1/2 cup of this for topping. Press the rest into 8 inch square pan. Bake at 350 degrees for 7 minutes. Cool.

Beat cream cheese until light and fluffy. Add sweetened condensed milk, sour cream, eggs and vanilla. Pour into pan on top of baked crust. Crumble reserved mixture on top. Bake at 350 degrees for 30 minutes. Cool and chill and cut into squares.