Peanut Butter Oatmeal Sandwich Cookies

Ingredients (17)

• For the Cookies:
• 3/4 cup all-purpose flour
• 1/2 teaspoon baking soda
• 1/4 teaspoon baking powder
• 1/2 teaspoon salt
• 1/2 cup unsalted butter
• 1/2 cup creamy peanut butter
• 1/2 cup granulated sugar
• 1/2 cup packed light brown sugar
• 1 large egg
• 1 teaspoon vanilla extract
• 1 cup quick-cooking oats
• For the Filling:
• 3 tablespoons unsalted butter
• 1/2 cup creamy peanut butter
• 1 cup powdered sugar
• 3 tablespoons heavy cream