Chewy Peanut Butter Cookies

Ingredients (11)

• 1 1/4 cup all-purpose flour
• 2 teaspoons cornstarch
• 1/2 teaspoon EACH: baking soda and baking powder
• 1/2 cup butter at room temperature (we like salted - see notes)
• 1/2 cup granulated sugar
• 1/2 cup brown sugar firmly packed
• 1 large egg
• 1 cup peanut butter we like salted natural peanut butter - see notes
• 1 teaspoon vanilla extract
• Optional: granulated sugar for dusting the cookies
• Optional: flaky sea salt