2 sleeves Ritz crackers, crushed
1 stick butter, melted

Mix together and put 3/4 of mixture in bottom of 9x13 inch pan. In large bowl mix:

1 can lemon pie filling
1 can sweetened condensed milk
1/4 c. lemon juice

Fold in an 8 oz. pkg. Cool Whip. Pour over crust and top with remaining crumb mixture. Refrigerate overnight.