Dough- Mix together butter, cream cheese and flour as for pie crust. Line small muffin tins by patting in mixture. Fill 1/2 to 3/4 full with nut filling. Nut filling- Beat eggs, add sugar gradually. Add melted butter and vanilla. Add nuts and mix well. Bake in moderate oven 350* for about 20 minutes or until light brown. Makes 8 dozen. Sprinkle with powdered sugar before serving.