The Best Blondies – Coopers Gifts

Ingredients

• 1 cup unsalted butter melted
• 1 1/4 cup brown sugar* tightly packed
• 1/2 cup sugar
• 2 large eggs + 1 egg yolk room temperature preferred
• 2 teaspoons vanilla extract
• 2 1/2 cups all-purpose flour
• 2 teaspoons cornstarch
• 1/2 teaspoon baking powder
• 1 teaspoon salt
• 2/3 cup white chocolate chips
• 1 cup chopped walnuts