Duff Goldman's Brown-Butter Blondies Recipe

Ingredients

• 1½ cups (3 sticks) butter
• 3 cups light brown sugar, lightly packed
• 3 extra-large eggs
• 1½ teaspoons pure vanilla extract
• 3 cups all-purpose flour
• 1 tablespoon baking powder
• 1/2 teaspoon kosher salt