01 -
Preheat oven to 175°C. Line two baking sheets with parchment paper.
02 -
In a medium bowl, whisk together the flour, baking soda, baking powder, and salt. Set aside.
03 -
In a large bowl, cream the softened butter, brown sugar, and granulated sugar until light and fluffy, about 2 to 3 minutes.
04 -
Beat in the egg and vanilla extract until fully incorporated.
05 -
Gradually add the dry ingredients to the wet ingredients, mixing just until combined.
06 -
Gently fold in the diced rhubarb and optional nuts or cinnamon, being careful not to overmix.
07 -
Scoop tablespoon-sized portions of dough onto the prepared trays, spacing about 5 cm apart.
08 -
Bake for 11 to 13 minutes, or until edges are golden and centers are just set.
09 -
Allow cookies to cool on the baking sheets for 5 minutes, then transfer to a wire rack to cool completely.