60 Ritz crackers, crushed
1 stick butter, melted
1/4 c. sugar

Press into 9 x 13 inch pan (reserve some crumbs).

1 (6 oz.) orange juice concentrate
1 can sweetened condensed milk
2 cans mandarin oranges, drained
8 oz. Cool Whip

Spread this over crumb crust. Top with reserved crumbs.