http://www.ohsoshabbybydebbie.com/ but on her Facebook page not at the website
Cake 1 box Betty Crocker® SuperMoist® white cake mix 1 1/4 cups water 1 tablespoon vegetable oil 4 eggs Key Lime Filling 1 can (14 oz) sweetened condensed milk (not evaporated) 3/4 cup whipping cream 1/2 cup Key lime juice or regular lime juice 1 teaspoon grated lime peel 4 drops yellow food color 1 drop green food color Frosting 1 container (12 oz) Betty Crocker® Whipped vanilla frosting 2 teaspoons grated lime peel 1 Heat oven to 350°F (325°F for dark or nonstick pan). Spray bottom only of 13x9-inch pan with baking spray with flour. 2 In large bowl, beat cake ingredients with electric mixer on low speed 30 seconds, then on medium speed 2 minutes, scraping bowl occasionally. Pour into pan. 3 Bake 27 to 33 minutes or until toothpick inserted in center comes out clean. Cool 5 minutes. With handle of wooden spoon (1/4 to 1/2 inch in diameter), poke holes almost to bottom of cake every 1/2 inch, wiping spoon handle occasionally to reduce sticking. 4 In medium bowl, stir together filling ingredients (mixture will thicken). Pour over cake; spread evenly over surface, working back and forth to fill holes. (Some filling should remain on top of cake.) Refrigerate 1 hour. 5 Spread frosting over cake; sprinkle with lime peel. Garnish as desired. Store loosely covered in refrigerator.