Add <quantity>110<unit>g</unit></quantity> of butter and <quantity>100<unit>g</unit></quantity> brown sugar to a stand mixer bowl

Add <quantity>90<unit>g</unit></quantity> of sugar

Mix with the paddle attachment until creamy

Add <quantity>1</quantity> egg and keep mixing to combine

Add <quantity>200<unit>g</unit></quantity> of all-purpose flour and <quantity>2<unit>g</unit></quantity> of baking soda

Add <quantity>125<unit>g</unit></quantity> of dark chocolate chips, <quantity>125<unit>g</unit></quantity> of milk chocolate chips, and <quantity>4<unit>g</unit></quantity> of salt

Whisk with the paddle attachment until completely combined

Line a tray with parchment paper. Portion the cookies with an ice cream scoop and place them on the tray

Place in the refrigerator for 30m to firm up

Preheat the oven to <temperature>170<unit>°C</unit></temperature>

Place the dough portions about <quantity>4<unit>cm</unit></quantity> apart on a sheet tray lined with parchment paper

Bake the cookies for 12m until golden brown on the edges. The chocolate chip cookies are ready

Grab a glass of milk and enjoy!