In medium mixing bowl sift together flour, baking soda, salt and SACO Buttermilk Blend; set aside. In large mixing bowl cream together shortening and sugar.
Add egg and beat well.
Stir in water.
Add dry ingredients to creamed mixture and stir until well-blended.
Do not overbeat.
Fold in vanilla and rhubarb.
Pour into pan.
In small mixing bowl stir together all Cinnamon Topping ingredients.
Sprinkle on topping before baking for 35 to 40 minutes, or until inserted wooden toothpick comes out clean.
Cinnamon Topping
in a medium mixing bowl combine all topping ingredients