1 can sweetened condensed milk
1 (16 oz.) Cool Whip
1 (6 oz.) can frozen orange juice, undiluted
3 cans mandarin oranges, drained and cut up

Stir sweetened condensed milk, vigorously until it thins out somewhat. Then stir in Cool Whip. Mix in the thawed orange juice. Fold in oranges. Spoon mixture into crumb-lined pan. Sprinkle with crumb mixture. Refrigerate until firm or until ready to serve.

CRUMB BASE:

60 Ritz crackers, crushed
1/2 c. sugar
1/2 c. butter

Blend ingredients together. Divide mixture using about 2/3 for bottom crust in a 9x13 inch pan. Sprinkle remaining over filling.