Ingredients:
1 1/2 cups brown sugar
1/2 cup margarine
1 egg
1 cup buttermilk
2 cups flour
1 tsp. baking soda
1/2 tsp Madagascar vanilla
2 cups fine cut rhubarb
Topping:
1/2 cup sugar
1/2 tsp. cinnamon
2 Tblsp. flour
2 Tblsp. butter or margarine
Directions:
Beat brown sugar and margarine. Beat in egg. Combine ingredients and add milk alternately with buttermilk. Stir in vanilla and rhubarb. Pour into greased 9-13 inch pan. Combine topping ingredients to make crumbs. Sprinkle on top of batter and bake at 350 degrees until toothpick inserted in center comes out clean, 20-30 minutes.
Madagascar Vanilla (purchase at Chefs Catalog) Of all the vanilla's I've used this is my favorite. Once you've tried it you won't go back!