Preheat oven to 350°. Coat a 13x9-in. baking dish with cooking spray. Combine walnuts and cinnamon., Unroll phyllo dough. Layer 2 sheets of phyllo in prepared pan; brush with butter. Repeat with 6 more sheets of phyllo, brushing every other 1 with butter. (Keep remaining phyllo covered with a damp towel to prevent it from drying out.), Sprinkle 1/2 cup nut mixture in pan; drizzle with 2 tablespoons honey. Add 2 more phyllo sheets, brushing with butter; sprinkle another 1/2 cup nut mixture and 2 tablespoons honey over phyllo. Repeat layers 6 times. Top with remaining phyllo sheets, brushing every other 1 with butter., Using a sharp knife, score surface to make 24 squares. Bake until golden brown and crisp, 25-30 minutes. Cool on a wire rack 1 hour before serving.