1 1/2 c. brown sugar, packed
1/2 c. butter
1 egg
2 c. flour
1 tsp. baking soda
1/4 tsp. salt
1 c. sour cream
1/2 c. diced rhubarb in 1/2 inch pieces

Cream brown sugar and butter. Add egg and beat again. Mix flour, baking soda, salt and add alternately with sour cream. Mix in rhubarb. Turn into greased and floured 13 x 9 inch pan and sprinkle with topping.

Bake at 350 degrees about 45 to 50 minutes. Cut in squares when cool.

TOPPING:

1/2 c. sugar
1 tbsp. butter
1/2 c. chopped nuts
1 tsp. cinnamon

Combine ingredients. Mix well. Sprinkle on cake before baking.