Preheat oven to 350 degrees. Lightly spray a 13†x 9†baking dish with non-stick cooking spray. In a large bowl, beat together cake mix, pudding mix, Ricotta cheese, oil, eggs and lemon extract on medium speed for 2 minutes. Pour into prepared pan. Mix together sugar and cinnamon, sprinkle over cake batter. Swirl sugar/cinnamon mixture into batter. Bake for 35- 45 minutes, or until a toothpick comes out clean. Allow to cool slightly, cut into squares.