Rhubarb Muffins

- 1 cup buttermilk

- 1/2 cup vegetable oil

- 1 egg

- 2 1/2 cups flour

- 2 1/2 cups diced rhubarb

- 1 1/4 cup brown sugar

- 1 tsp baking powder

- 1/2 tsp baking soda

- 1/2 tsp salt

- 2 tsp vanilla

Streusel:

- 1 cup flour

- 1/2 cup butter

- 1 cup brown sugar

- 1 tsp cinnamon (optional)

Combine wet ingredients.  In another bowl combine dry ingredients.  Combine wet and dry ingredients and stir in rhubarb.  Fill muffin tins about 2/3rds full.  Combine streusel ingredients until crumbly and divide between filled muffin cups.  Bake at 350 for 25 minutes.