CAKE:

1 pkg. Pillsbury Plus Butter Recipe Cake Mix
2 tbsp. lime juice plus water to equal 1 c.
1/2 c. butter, softened
3 eggs
Above 3, 500 feet add 1/3 cup flour to dry cake mix

FILLING:

1 (14 oz.) can sweetened condensed milk (not evaporated)
1/2 c. lime juice
2 c. whipping cream or lg. Cool Whip

GARNISHES:

Lime slices

Heat oven to 350 degrees. Grease and flour 2 (9 or 8 inch) cake pans. Combine cake ingredients in large bowl. Beat on high 2 minutes and pour into cake pans. Bake 9 inch pan at 350 degrees 20 to 30 minutes; (8 inch pan 30 to 40 minutes), until toothpick comes out clean. Cool 15 minutes. Remove from pans and cool completely. When cool slice each layer in 1/2 to make 4 total layers. Serated knife is best.

In small bowl, combine condensed milk and lime juice and mix well. Beat whipping cream until stiff peaks form, or use Cool Whip. Reserve 1 cup whipped cream for top and fold condensed milk mixture into Whip Cream just until blended. Place 1 cake layer, cut side up, and spread with 1/3 whipped cream filling. Repeat for second and third layer. Fourth layer garnish with whip cream and lime slices. Refrigerate 2 or 3 hours.