This is from the back of a Hershey's cocoa box.
Hershey's "Perfectly Chocolate" Chocolate Frosting
1/2 cup (1 stick) butter
2/3 cup Hershey's cocoa
3 cups powedered sugar
1/3 cup milk
1 teaspoon vanilla
Melt butter. Stir in cocoa. Alternately add powder sugar and milk, beating to spreading consistency. Add small amount of additional milk, if needed. Stir in vanilla. Makes about 2 cups of frosting.
This is a recipe from the back of a Hershey's cocoa box from a million years ago, maybe as many as 40 years ago when I was a young wife and mother.
Hershey's Likety-Split Chocolate Frosting
3 cups powdered sugar
1/2 cup cocoa
1/8 teaspoon salt
6 Tablespoons milk
2 teaspoons vanilla
1/3 cup butter, softened
Combine sugar, cocoa and salt in a large mixing bowl. Add milk and vanilla. Mix well until smooth. Add butter and beat until spreading consistency.
Makes about 2 cups frosting enough for an 8"-9" layer cake.