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.