1. Combine pecans, butter, 1 egg, and cake mix, stirring until well blended; press in bottom of a lightly greased 13- x 9-inch pan.
2. Beat remaining 2 eggs, cream cheese, and powdered sugar at medium speed with an electric mixer until smooth. Pour over cake mix layer.
3. Bake at 325° for 40 minutes or until set. Cool in pan on a wire rack. Cut into squares.