Thomas Keller’s Brownies

INGREDIENTS

• 3/4 cup all-purpose flour
• 1 cup unsweetened alkalized cocoa powder
• 3/4 pound (3 sticks) unsalted butter, cut into 1-tablespoon pieces
• 1 teaspoon kosher salt
• 3 large eggs
• 1 3/4 cups granulated sugar
• 1/2 teaspoon vanilla paste
• 6 oz 61 to 64% chocolate, chopped into chip-sized pieces ( about 1 1/2 cups)
• Powdered sugar for dusting