Preheat oven to 180°C/Gas Mark 4/350°F and line a brownie tin (approx 24cm x 24cm).
Optional: 'Bloom' the cacoa powder by mixing it with the hot espresso . This makes the chocolate flavor more intense and rich. You can omit this step if you don't drink coffee.
In a large bowl, whisk flour, brown sugar, cocoa, spices (if using) baking powder & salt.
240 grams plain (all purpose) flour, 250 grams brown sugar, 1 teaspoon baking powder, 1 teaspoon salt
Mash the bananas well.
300 g mashed ripe bananas
Stir the milk, oil, and vanilla until well-blended.
150 ml unsweetened soy milk or oat milk, 120 ml sunflower or other unflavoured oil, 1 teaspoon vanilla extract
Add banana and other liquids to the flour mix and stir gently until combined.
Add the choc chips and fold through the batter.
100 grams dark vegan chocolate chips
Pour the (now delicious smelling) brownie batter into prepared baking pan and bake for 25-30 minutes, or until a toothpick inserted in the centre comes out clean.
(Make sure you don't overbake, or the brownie may not be as fudgy and squidgy).
Cut into squares & sprinkle some icing sugar over to serve.
Notes
This recipe stores well for at least a week. Just store in an airtight container.