Macadamia Butterfingers
["1 c. butter, softened", "1/2 c. packed brown sugar", "1/2 c. granulated sugar", "1 egg, separated", "1/2 tsp. ground nutmeg", "2 c. all-purpose flour", "1 tsp. vanilla extract", "1 c. Macadamia nuts, finely chopped", "1 Tbsp. granulated sugar"]
["Preheat oven to 275\u00b0.", "Lightly grease a 15 x 10-inch jelly roll pan.", "In a large mixing bowl, beat butter, brown sugar, granulated sugar, egg yolk and nutmeg until light and fluffy.", "Add flour; stir to combine.", "Pat dough over bottom of prepared pan."]
["butter", "brown sugar", "sugar", "egg", "ground nutmeg", "flour", "vanilla extract", "nuts", "sugar"]