Preheat oven to 350 degrees. Grease and flour a 10-inch Bundt pan or 9-inch tube pan. In a large bowl, cream together the butter and white sugar
until smooth. Beat in eggs one at a time, mixing well after each, then stir in the vanilla. Combine the flour, baking soda, salt, and mace; mix
into the batter just until smooth. Stir in sour cream. Spoon batter into the prepared pan, and spread evenly. Bake for 1 hour and 20 minutes in a
preheated oven. Cool for at least 10 minutes before inverting pan onto a plate, and tapping out the cake. Dust with confectioners' sugar before serving.
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