1 (20 oz.) can crushed pineapple (undrained)
1 (6 oz.) pkg. orange Jell-O
2 c. buttermilk
1 (8 oz.) carton Cool Whip, "thawed"

In saucepan, bring pineapple to a boil. Remove from heat. Add Jell-O. Stir to dissolve. Add buttermilk. Mix well. Cool to room temperature. Fold in Cool Whip. Pour into dish. Refrigerate overnight.