Danna'S Chewy Bar Cookies
["1/2 c. butter or margarine", "1 c. firmly packed brown sugar (light)", "1 c. firmly packed dark brown sugar", "2 eggs", "1 1/2 c. all-purpose flour", "1 1/2 tsp. baking powder", "1/2 tsp. salt", "1 tsp. vanilla", "1 c. chopped pecans"]
["Cream the butter.", "Gradually add sugars, beating well.", "Add eggs; beat well.", "Combine flour, baking powder and salt; add to creamed mixture, stirring well.", "Stir in vanilla and pecans. Spread in a greased 13 x 9 x 2-inch baking pan.", "Bake in a 325\u00b0 oven for 30 minutes.", "Cut into 2 x 1-inch bars; cool on wire racks.", "Yields about 4 1/2 dozen."]
["butter", "brown sugar", "brown sugar", "eggs", "flour", "baking powder", "salt", "vanilla", "pecans"]