Combine yellow cake mix 1 egg and oil Press into 13 x 9-inch greased pan and bake at 300 for 20 minutes While cake is cooking mix 4 eggs sugar Karo syrup butter and chopped pecans Pour mixture over cooked cake and bake 45 minutes on 300 Since oven temperatures vary during the last 5 to 10 minutes of cooking check closely Do Not Over Cook Better than pecan pie if you can believe it