1. Preheat oven to 350 degrees. Arrange chopped pecans in a single layer in a shallow pan. Bake 5 to 7 minutes or until toasted and fragrant. Reduce oven temperature to 300 degrees.
2. Stir together cake mix, 1 egg, butter, and toasted pecan; press mixture into bottom of a lightly greased 13-x9-inch pan.
3. Beat sugar, cream cheese, and remaining 3 eggs at medium speed with an electric mixer until smooth. Pour powdered sugar mixture over batter in pan, spreading to edges.
4. Bake at 300 degrees for 1 hour. Let cool 1 hour or until completely cool. Cut cake into 2-1/2 to 3-inch squares.