1/2 c. butter
1/2 c. brown sugar
1 egg
1 tsp. vanilla
1 c. milk
2 1/4 c. flour
1/2 tsp. salt
1 tsp. baking soda
2 c. rhubarb

Sprinkle 1/2 cup sugar with 2 teaspoons cinnamon over cake. Bake 30- 35 minutes.