Rock Candy
["3 1/2 c. sugar", "1 c. white Karo", "1 c. water", "oil flavoring (your choice)", "food coloring (your choice)", "butter or margarine", "powdered sugar (optional)"]
["You will need an 11 x 13-inch baking sheet."]
["sugar", "white Karo", "water", "oil", "food coloring", "butter", "powdered sugar"]