Prepare a 9x11" square pan or 10" loaf pan baking pan by lining it with baking paper.
Preheat the oven to 170 degrees Celsius.
Combine the dry ingredients in a bowl: all-purpose flour, baking soda, baking powder, and salt.
190 gs all-purpose flour, 1/2 tsp baking soda, 1/2 tsp baking powder, 1/4th tsp salt
In a stand mixer (or a bowl with an electric mixer), add the softened butter*, and both the sugars and cream together on high speed for 2-5 minutes until well combined. The mixture should be nice and creamy. Make sure not to overmix at this point!*
25 gs white sugar, 165 gs brown sugar, 113 gs unsalted butter, softened
Add the room temperature eggs* and vanilla essence into the butter mix and whisk together until well combined. Make sure the eggs are fully incorporated into the butter and there is no liquid left in the batter.
1 tsp vanilla essence, 1 eggs
With the mixer on slow, add the dry ingredients into the batter and keep mixing on slow until everything is well incorporated and there are no streaks of flour still remaining in the mix. You will have a nice, thick dough at this point.
Finally, add the chocolate chips into the dough and mix on high speed for a few seconds just to incorporate them in, don’t overmix.
Transfer the cookie batter in the prepared baking sheet and let it chill in the fridge for atleast 15-20 minutes while you prepare the brownie.