Best Peanut Butter Chip Cookies

Ingredients

• 3/4 cup all-purpose flour (spooned and leveled)
• 1/2 cup cake flour (spooned and leveled)
• 1 tsp. cornstarch
• 1 tsp. baking soda
• 1/2 tsp. baking powder
• 1/2 tsp. salt
• 3/4 cup creamy peanut butter (like Skippy or Jif, not a natural peanut butter)
• 1/2 cup unsalted butter (room temperature )
• 2/3 cup packed brown sugar
• 1/4 cup granulated sugar (plus more for rolling)
• 1 large egg (room temperature)
• 1 large egg yolk (room temperature)
• 2 tsp. vanilla extract
• 1, 10 oz. bag peanut butter chips (~2 cups (or you can add in mini chocolate chips or chopped peanuts))
• Flaky sea salt (such as Maldon, for finishing)