Ingredients (11)

8 ounces unsalted butter (2 sticks; 225g)

1 standard ice cube (about 2 tablespoons; 30mL frozen water)

10 ounces all-purpose flour (about 2 cups; 280g)

3/4 teaspoon (3g) baking soda

2 teaspoons Diamond Crystal kosher salt or 1 teaspoon table salt (4g)

5 ounces granulated sugar (about 3/4 cup; 140g)

2 large eggs (100g)

2 teaspoons (10mL) vanilla extract

5 ounces dark brown sugar (about 1/2 tightly packed cup plus 2 tablespoons; 140g)

8 ounces (225g) semisweet chocolate, roughly chopped with a knife into 1/2- to 1/4-inch chunks

Coarse sea salt, for garnish