Dark Hazelnut Toffee
["3/4 c. coarsely chopped hazelnuts (filberts)", "1 c. butter", "1 1/4 c. packed brown sugar", "3 Tbsp. water", "1 Tbsp. dark corn syrup", "3/4 c. milk chocolate pieces", "1/4 c. finely chopped hazelnuts (filberts)"]
["Line a 13 x 9 x 2-inch baking pan with foil, extending foil over the edges of the pan.", "Sprinkle the 3/4 cup hazelnuts on the bottom of the foil-lined pan. Set pan aside."]
["hazelnuts", "butter", "brown sugar", "water", "corn syrup", "milk chocolate", "hazelnuts"]