4 Layer Chocolate Dessert
["1 1/2 sticks butter", "1 c. pecans, chopped", "1 1/2 c. flour (all-purpose)"]
["Mix and pat firmly in a 13 x 15-inch baking dish.", "Bake at 350\u00b0 for 20 minutes.", "Let cool."]
["butter", "pecans", "flour"]