1/2 c. butter
2 c. brown sugar
2 c. white sugar
1/2 c. Karo
1 c. milk
5 tbsp. cocoa
2 tsp. vanilla

Place all except cocoa and vanilla in heavy saucepan. Stir over medium heat until sugar dissolves. Boil hard 2 1/2 minutes stirring rapidly. Add cocoa, boil until soft ball 236 degrees. Add vanilla. Cool, then beat until all gloss disappears.