This is a different and excellent poundcake. The girls at work love it and keep requesting it. Originally someone named Janet posted this recipe on TKL. Enjoy

KEY LIME DAIQUIRI POUND CAKE
(One 10" Cake)

1 cup butter or margarine, softened
1/2 cup shortening
3 cups sugar
5 large eggs
3 cups all-purpose flour
1/2 teaspoon baking powder
1 cup milk
2 tablespoons rum
1 tablespoon grated Key Lime rind
2 teaspoons Key Lime juice
1-1/2 teaspoons vanilla extract
1/2 teaspoon lemon juice

Beat butter and shortening at medium speed with an electric mixer about 2 minutes or until soft and creamy. Gradually add sugar, beating at medium speed 5 to 7 minutes. Add eggs, one at a time, beating just until yellow disappears.

Combine flour and baking powder; add to creamed mixture alternately with milk, beginning and ending with flour mixture. Mix at lowest speed just until blended after each addition. Stir in rum and next 4 ingredients.

Spoon batter into a greased and floured 10-inch tube pan. Bake at 325 degrees for 1 hour and 30 minutes or until a wooden pick inserted in center comes out clean. Cool in pan on a wire rack 10 to 15 minutes; remove from pan. While warm, prick top of cake with a wooden pick; pour Key Lime Daiquiri Glaze (recipe below) over cake. Let cool completely on a wire rack.

KEY LIME DAIQUIRI GLAZE

1/4 cup sugar
1/4 cup butter or margarine
2 tablespoons Key Lime juice
3 tablespoons rum

Combine sugar, butter, and Key Lime juice in a small saucepan; bring to a boil. Boil, stirring constantly, 1 minute. Remove from heat, and stir in rum.