Description

These scientifically-developed cookies feature deeply toasted brown butter and an extra egg yolk for an exceptionally chewy texture and nutty flavor profile. Balanced with a precise ratio of sugars and high-quality chopped chocolate, they offer a perfect contrast between crispy edges and a molten, fudgy center.

Ingredients

168g unsalted butter
212g light brown sugar
50g granulated sugar
220g all-purpose flour
1 large egg, room temperature
1 large egg yolk, room temperature
1 tablespoon pure vanilla extract
3/4 teaspoon baking soda
3/4 teaspoon kosher salt
210g semisweet chocolate, roughly chopped

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Instructions

Brown the butter in a small saucepan over medium-low heat until it smells nutty and contains goldenspecks; weigh it to ensure you have exactly 140g of fat and milk solids, adding a teaspoon of milk if it is underweight.
In a large bowl, whisk the warm brown butter with the light brown and granulated sugars, then whisk in the egg, egg yolk, and vanilla for 30 seconds until the mixture is thick and emulsified.
Sift together the flour, baking soda, and salt, then fold them into the wet mixture using a spatula just until no flour streaks remain.
Fold in the chopped chocolate, cover the dough with plastic wrap directly on the surface, and refrigerate for at least 1 hour, or preferably 24 hours, to allow for full hydration.
Preheat your oven to 350°F (175°C), scoop 1.5-ounce portions of dough onto parchment-lined baking sheets, and bake for 11 to 13 minutes until the edges are golden but the centers are still soft.

Notes

For the best results, use a digital scale to measure your ingredients as volume can vary significantly. Cooling the dough is a non-negotiable step that prevents excessive spreading and develops the Maillard reaction for a deeper flavor. If your cookies do not come out perfectly round, use a large circular cutter to gently shape them immediately after removing them from the oven while they are still soft.

Prep Time: 1 hour 15 mins
Cook Time: 12 mins
Category: Dessert
Method: Baking
Cuisine: American