In a mixing bowl cream butter; gradually add brown sugar and beat until light and fluffy. Beat in eggs, one at a time.
Sift together flour, cinnamon, baking soda, baking powder and salt; add to creamed mixture alternately with sour cream, beginning and ending with dry ingredients. Stir in nuts.
Turn into buttered 9x5x3" loaf pan. Bake in a preheated 350°F oven for 45-50 minutes. Turn out of pan onto wire rack to cool.
Makes 1 loaf.
Submitted by: CM