Key Lime Cake 1 (18.25 ounce) box lemon cake mix 1 small box instant lemon pudding mix 3/4 cup water 1/2 cup vegetable oil 4 eggs 5 tablespoons Key lime juice 1 1/2 cups confectioners' sugar 3 tablespoons Key lime juice Preheat oven to 350 degrees F. Lightly grease a 13 x 9-inch cake pan or one 10-inch Bundt pan. In a large bowl stir together lemon cake mix, lemon instant pudding, water, oil, eggs and 5 tablespoons Key lime juice, mixing well. Pour batter into prepared pan. Bake at 350 degrees F for 45 minutes. Pour Key Lime Glaze over cake while still warm. Key Lime Glaze Mix together the confectioners' sugar and the 3 tablespoons key lime juice (or more if necessary). Spoon glaze over warm cake.