Preheat oven to 350 degrees. Grease and flour 10-inch Bundt or 9 inch loaf pan.
Combine cake mix, pudding mix, eggs, water, oil, and lemon extract in large bowl.
Beat with an electric mixer at medium speed for 2 minutes.
Pour into prepared pan. Bake 40 - 50 minutes or until toothpick inserted in center comes out clean.
Cool cake on wire rack for 25 minutes. Remove cake from pan and cool completely.
To make the glaze: combine the powdered sugar and 2 tbsp lemon juice until smooth. Adding 1 tbsp of lemon juice at a time till the glaze is your desired consistency. Drizzle over cooled cake and let set till hardened.