1In a large bowl, cream together the butter, shortening and sugar until light and fluffy. Beat in the eggs one at a time, then stir in the vanilla and lemon extracts. Beat in the flour alternately with the lemon-lime soda, mixing just until incorporated.
2Pour batter into prepared pan. Bake in the preheated oven for 70 minutes, or until a toothpick inserted into the center of the cake comes out clean. Allow to cool on a cake rack for 30 minutes before removing from the pan.
2 cups confectioners sugar
2 to 3 tablespoons 7-up