1 envelope unflavored gelatin
1/2 c. cold water
1/2 c. sugar
1/4 c. cocoa
1/4 tsp. salt
1-2/3 c. Pet milk, divided
1 tsp. vanilla
graham cracker crust
Hershey bar

Soften in a 1-qt. saucepan the gelatin in cold water. Stir in sugar, cocoa and salt. Stir over medium heat until gelatin and sugar dissolve completely, about 5 minutes. Don't boil. Remove from heat. Stir in 1 c. Pet milk. Chill in small bowl until firm. Beat in with mixture at low speed until mixture is broken up. Add 2/3 cup Pet milk and the vanilla. Beat at high speed until mixture fills bowl. Let stand a few minutes or until mixture mounds when dropped from spoon. Heap into a graham cracker crust. Shave a Hershey bar over the top. Chill.