Makes scant 2 cups

1 cup brown sugar
1 cup granulated sugar
1/4 corn light corn syrup
2 cups water
3 tablespoons butter
1/4 cup chopped walnuts, toasted (optional)

Bring sugars, corn syrup, and water to boil in a medium saucepan. Reduce heat and simmer until mixture thickens to a syrup consistency, 10 to 12 minutes. Stir in butter and nuts, cool slightly and serve. (Can be refrigerated up to 1 month.)