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In 1-quart saucepan, heat 1/2 cup butter over medium heat 8 to 10 minutes, stirring frequently, until light golden brown. Pour into large bowl. Stir cookie mix, 1/2 teaspoon cinnamon and the egg into browned butter with wooden spoon until soft dough forms. Spoon dough in tablespoons evenly over top of peach mixture; sprinkle with sparkling sugar.