best cocoa brownies

Ingredients in this Recipe

1 1/4 cups (250 grams) sugar
1/2 cup (65 grams) all purpose flour
1/2 teaspoon pure vanilla extract
1/4 teaspoon salt (or a heaping 1/4 teaspoon flaky salt, as I used)
10 tablespoons (140 grams) unsalted butter
2 large eggs, cold
2/3 cup (75 grams) walnut or pecan pieces (optional)
3/4 cup plus 2 tablespoons (65 grams, though some brands may weigh more) unsweetened cocoa powder (natural or Dutch process)

See Full Recipe at Smitten Kitchen