Preheat oven to 350 degrees. Lightly oil a 9 inch square baking pan.

In a large bowl, sift the dry ingredients until combined.

Add the wet ingredients, slowly mixing to gently combine.

Optional: fold in the walnuts!

Pour batter into baking pan.

Bake for 45-50 minutes in the middle rack of your oven, turning pan halfway through for even baking.

Let cool completely on wire rack, then chill to harden in refrigerator for 1 hour before slicing.

Dust with icing sugar if you so wish – this is done by holding a little wire sieve on top of the brownies, sprinkling icing sugar into the sieve and shaking it around, creating a light dust of powdery sugar. Fresh berries add a bright blast of colour too! Enjoy!