With both brown and white sugar.
From the box of Evia Marie Sands of Louisville, Kentucky.
Fudge
2 cups white sugar
2 cups brown sugar
1/2 cup or 4 ounces of cocoa or chocolate
1 cup Karo corn syrup
1 cup milk or cream
1/2 cup of melted butter
3 teaspoons vanilla
Mix sugar, Karo, cocoa, milk, and butter together and bring to boil–cook for 7-1/2 minutes or until it forms soft ball in cold water.
Beat until creamy and pour into buttered pan and cut into squares.