01 -
Set oven to 190°C and allow it to fully preheat.
02 -
In a large mixing bowl, combine brown sugar, softened butter, vanilla extract, and egg. Beat with an electric mixer until light and fluffy.
03 -
Add flour, cinnamon, salt, baking soda, and baking powder to the bowl. Mix well until a cohesive dough forms.
04 -
Add finely diced rhubarb to the dough and mix until evenly distributed.
05 -
Using a 2.5 cm cookie scoop, portion dough into balls and place onto a parchment-lined baking tray, spacing them evenly.
06 -
Bake in the centre of the preheated oven for 12–14 minutes or until the cookies are fully baked and lightly golden.
07 -
Allow cookies to cool on the baking tray for 2 minutes, then transfer to a wire rack to cool completely.