Ingredients:

2/3 cup Hershey's cocoa
3 cups sugar
1/8 tsp salt
1 1/2 cups milk
1/4 cup butter
1 tsp vanilla 
peanut butter
marshmallow

Procedure:

Combine cocoa with sugar & salt.
Add milk.
Bring to boil, stirring frequently.
Cook to 232 degrees, or until a small amount of mixture forms a soft ball when dropped in cold water.
Remove from heat.
Add butter.
Stir in 1/2 to 1 cup each of peanut butter & marshmallow.
Beat rapidly.
Then add vanilla.
Pour into 2 buttered pans.
Cut into squares when cooled.