Place butter or margarine in a medium saucepan. Heat on low until melted. Add Confectioner's sugar, syrup, and water, and bring to a boil over medium heat. Boil, stirring constantly, for one minute exactly.
Remove from heat, add chopped pecans. Best served warm, but may be cooled and refrigerated, covered. Keeps indefinitely.
Makes 1 cup, about 12 servings.
Not a NESTLÉ®-tested recipe.