Set oven to 350°
Start melting your butter, while you gather your ingredients.
Whisk the flour, baking soda, baking powder, and salt together in a large bowl. Set aside.
In a medium bowl, whisk the melted butter, brown sugar, and granulated sugar together until no brown sugar lumps remain. I like to mix this for at least two minutes.
Whisk in the eggs and the vanilla.
Pour in the dry ingredients and mix together with a large spoon or rubber spatula. I love my danish dough hook for this. The dough will be very soft, thick, and appear greasy.
Fold in the chocolate chips.
Scoop the dough with an ice-cream scoop onto a parchment paper-lined baking sheet, leaving at least 4 inches of space between the cookies and 2 inches from the edges of the pan so that the cookies can spread evenly.
Bake for 8-10 minutes or until the edges have started to barely brown.
If using a large scooper, it can take 10-12 minutes
Let cool on the pan for two minutes, and then remove to a cooling rack.
You can also freeze part of the dough if you only need to bake 1/2 batch, and then have cookie dough in the freezer for anouther time!