In a small bowl combine brown sugar, nuts, 1 tablespoon sugar and cinnamon; set aside. In a mixing bowl cream butter; gradually add 1 cup sugar; beat until light and fluffy. Beat in eggs, one at a time. Blend in vanilla and lemon juice.
Sift together flour, baking powder and baking soda; add to creamed mixture alternately with sour cream, beginning and ending with dry ingredients. Pour half the batter into pan; sprinkle with brown sugar mixture. Add remaining batter.
Bake in a 350°F preheated oven for 45-50 minutes. Cool 10 minutes on wire rack; carefully turn out of pan. Serve warm.
Submitted by: CM