Peanut Butter Cookies

Bahan-bahan (4 porsi)

• 2 2/3 cups all-purpose flour
• 1 teaspoon baking powder
• 1 teaspoon baking soda
• 1 teaspoon cornstarch
• 1 teaspoon salt
• 1 cup (2 sticks) butter, softened
• 1 cup granulated sugar
• 1 cup packed light brown sugar
• 1 cup peanut butter (smooth or crunchy)
• 2 teaspoons vanilla extract
• 2 large eggs
• (optional: 1/2 cup granulated sugar for rolling the dough balls)