Cream butter, add sugar. When smooth add sour cream,vanilla, salt and baking powder. Slowly add 2 cups of flour.
Filling: Chop nuts and add to sugar and cinnamon
Using a bundt pan grease well..Put in 1/2 batter, 3/4 filling, then remainder of batter and remainder of filling.
Bake in a preheated 350 degree oven for one hour.
Cool in pan one hour and sprinkle with powdered sugar.
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