Preheat oven to 325° F.
In a large bowl, cream butter, shortening and sugar until smooth and fluffy.
Add eggs, one at a time, then add sour cream and milk, mixing until smooth. Blend flour mixture into batter with a rubber spatula, stir in the extracts.
Pour into a greased and floured 10-inch tube pan and bake 1 hour 30 minutes or until a tester inserted in center comes out clean. Cool cake in the pan 10 minutes. Remove the cake from pan and cool on a rack. Drizzle with Lemon Sauce to serve.