01 -
Preheat oven to 375ºF.
02 -
Cream brown sugar, butter, and egg together until smooth.
03 -
Whisk together the flour, cinnamon, salt, baking soda, and baking powder in a bowl.
04 -
Gradually combine the wet and dry ingredients to form a dough.
05 -
Gently fold in the finely diced rhubarb.
06 -
Scoop the dough onto a greased cookie sheet, spacing evenly.
07 -
Bake for 12-14 minutes until golden brown.
08 -
Cool on the baking sheet for 5 minutes, then transfer to a wire rack.