Butter-Pecan Turtle Bars
["2 c. all-purpose flour", "1 c. brown sugar", "1/2 c. soft butter", "1 c. chopped pecans", "2/3 c. butter", "1/2 c. brown sugar", "1 c. chocolate chips"]
["For crust, in electric mixer, mix the first 3 ingredients at medium speed for 2 or 3 minutes.", "Pat firmly in ungreased 9 x 13-inch pan.", "Sprinkle chopped pecans over unbaked crust."]
["flour", "brown sugar", "butter", "pecans", "butter", "brown sugar", "chocolate chips"]