Pre heat your oven to 180C / 350F fan forced (10 degrees more for non fan forced)
Combine melted butter and cocoa powder
Add eggs, sugar and vanilla and beat until smooth for 1 minute. If using a thermomix, 6 seconds, speed 6 will do it.
Mix in almond meal, corn/tapioca flour, baking powder and choc chips and turn by hand until just mixed (or speed 1 thermomix, 10 seconds)
Spread the mixture into a lined baking tin of 20cm for a thicker brownie and 30 minute cook time, OR 25cm bake tin for a 25 minute cook time.
I would check them at 20 minutes onwards every few minutes because it's always a bit different depending on the tin size and oven style.
You're done! How easy was that?