Melt the butter in a heatproof bowl in the microwave. Add the sugars and whisk very well, for at least 30 seconds.

Crack in the egg, vanilla, soda, powder and salt and whisk very well.

Fold in the flour, when it’s almost fully combined add the chocolate chips and fold until the dough is well mixed.

Cover with plastic wrap and leave on the counter for 1 hour.

Preheat the oven to 375 F.

Divide the dough into 4 parts, each dough mound will weigh roughly 150g. Space them on a standard cookie sheet so there’s enough room all around for them to spread.

Set them in the oven and after five minutes, lower the temperature to 350 F. Remove after another 10-12 minutes and leave on the pan to cool.