Hazelnut Butterscotch Sauce Yield: about 1-1/3 cups. 1 cup firmly-packed dark brown sugar dash salt 1/3 cup milk 2 tablespoons light corn syrup 3 tablespoons butter or margarine 1/2 cup roasted & coarsely chopped Oregon hazelnuts 1 teaspoon vanilla Combine sugar, salt, milk, corn syrup and butter in saucepan. Bring to a boil, stirring constantly; cook about 5 minutes, or until thickened. Remove from heat and add hazelnuts and vanilla. Serve warm over ice cream.