Best Cocoa Brownies

advertise

Ingredients

10 tablespoons (1 1/4 sticks, 5 ounces or 141 grams) unsalted butter
1 1/4 cups (9 7/8 ounces, 280 grams) sugar
3/4 cup plus 2 tablespoons (2 7/8 ounces, 82 grams) unsweetened cocoa powder (natural or dutch-process)
1/4 teaspoon salt (or a heaping 1/4 teaspoon flaky salt, as i used)
1/2 teaspoon pure vanilla extract
2 large eggs, cold
1/2 cup (66 grams, 2 3/8 ounces) all-purpose flour
2/3 cup walnut or pecan pieces (optional)