These muffins are very light and moist.
What a great way to start the day!

Preheat your oven to 375 degrees Fahrenheit.
Grease 18 regular size muffin cups.


1-1/4 cups brown sugar
1/2 cup vegetable oil
1 egg
2 tsp vanilla extract
2-1/2 cups flour
1 tsp baking soda
1 tsp baking powder
1/2 tsp salt
1 cup butter milk or sour milk
1-1/2 cups finely chopped rhubarb

1 Tablespoon melted butter
1/3 cup sugar
1 tsp cinnamon

Combine the flour, baking soda, baking powder, and salt. Set aside.
Mix the brown sugar, oil, egg, and vanilla extract.
Alternately add the buttermilk and the flour mixture.
Stir in rhubarb.
Divide among the muffin cups.
Mix the topping ingredients and sprinkle over the muffins.
Bake for 20-25 minutes.
Let cool for about 5 minutes before turning out of pans.