Rhubarb Coffee Cake

Source: Mommy Logan

• 1/2 cup margarine
• 1 cup sugar
• 1 egg
• 1 cup buttermilk
• 1 tsp vanilla
• 1 cup whole wheat flour
• 1 cup white flour
• 1 tsp soda
• pinch of salt
• 2 cups rhubarb, diced

Topping:

• 1/2 cup brown sugar
• 1 tsp cinnamon
• 1/2 cup chopped walnuts

Mix liquid ingredients together. Mix dry ingredients, excluding rhubarb, together and then combine with liquid ingredients. Fold in 2 cups diced rhubarb. Spread in a greased 9x13 pan. Top with brown sugar, cinnamon, and chopped walnuts. Bake at 350 degrees for 35-45 minutes.