Step 1

Preheat oven to 375 degrees F.

Step 2

In a large bowl, beat brown sugar, butter, vanilla extract and egg together with an electric mixer.

Step 3

Add flour, cinnamon, salt, baking soda, and baking powder. Beat well until dough forms.

Step 4

Add rhubarb and beat again.

Step 5

Using a 1-inch cookie dough scoop, form balls of dough and place them on a parchment lined baking sheet.

Step 6

Bake cookies for 12-14 minutes or until baked through.

Step 7

Cool cookies on baking sheet for 2 minutes, then remove cookies from baking sheet and cool on a wire baking rack.