Melt butter in a small pan.
Cook so it starts to foam.
Swirl pan until it starts to smell nutty and looks brown.
Pour into a heat safe bowl with the two sugars.
Stir and let cool.
Once cooled, add eggs, yolk and vanilla.
Stir in flours, baking soda, baking powder, and salt.
Fold in MOST of the chocolates but not all. I reserve a bit of each to press into the cookie balls before they bake.
Wrap dough or bowl dough is in and chill 24 hours.
When time to bake, preheat oven to 350.
I placed rack on the second slot up from the bottom of my oven.
I weighed the dough into 2.5 ounce mounds and tried to stand them tall rather than round.
I placed 6 on a parchment lined cookie sheet and on the tops pressed in some of the reserved chocolates.
I baked them 15 mins, removed and reshaped with a round cookie cutter and baked an additional 3-4 minutes. (Watch yours closely for the correct baking time on your oven)
Cool 3-4 mins on sheet and then remove to a rack.