Step 1

Preheat oven to 350*F

Step 2

Prepare muffin tins with liners.

Step 3

In a stand mixer using paddle attachment, combine brown sugar, vegetable oil, egg and vanilla. Mix well.

Step 4

Add buttermilk and cinnamon. Mix well.

Step 5

Add salt, baking soda and baking powder. Mix well.

Step 6

Add rhubarb, mix well.

Step 7

Add flour, 1/2 cup at a time until thoroughly mixed.

Step 8

Fill muffin tins 3/4 full with mixture {a large cookie scoop works great!}

Step 9

In a separate bowl mix melted butter, sugar and cinnamon. Sprinkle on the top of each muffin.

Step 10

Bake 20 - 25 minutes or until toothpick comes clean when testing center of muffin.

Step 11

Allow muffins to cool IN PAN for additional 10 minutes before removing.