Butter a 23cm square tin; preheat the oven to 170C/Gas3
Melt the chocolate with the butter in a bowl in the microwave in 30 second bursts; add the sugar and stir to combine; leave to cool slightly
Add the eggs one by one to the chocolate mixture beating after each addition, until the mixture is very glossy
Gently fold in the ground almonds, baking powder and cinnamon, then add half the chocolate chips; spread the chocolate mixture over the base of the prepared tin; scatter over the remaining chocolate chips and bake for 25-35 minutes or until a skewer inserted at the centre comes out clean
Leave to cool in the tin; slice into squares; the brownies will keep well in an airtight container for several days
25 servings
mini brownies