3 1/4 cups
(445 g) homemade grain-free flour blend (see recipe below), or preferred gluten-free all-purpose flour
1/4 cup
(35 g) cornstarch
1 1/4 teaspoons
(5 g) baking powder
1 teaspoon
(7 g) Kosher salt, plus more for sprinkling
1 teaspoon
(6 g) baking soda
2
sticks (8 ounces) unsalted butter, at room temperature
1 cup
(212 grams) granulated sugar
1 cup
packed (200 grams) light brown sugar
2
large eggs, at room temperature
2 teaspoons
pure vanilla extract
1 pound
best-quality bittersweet chocolate (50-75% cacao content), chopped (about 3 1/2 cups)
1 cup
tapioca flour, spooned and leveled
1 cup
arrowroot flour, spooned and leveled
1 cup
coconut flour, spooned and leveled
1 cup
almond flour, spooned and leveled