Peanut Butter Sandwich Cookies

INGREDIENTS

• :
• 2 cups all-purpose flour, plus more for dusting
• ½ teaspoon baking soda
• ¼ teaspoon salt
• ¾ cup unsalted butter, at room temperature
• ¾ cup creamy peanut butter
• ½ cup granulated sugar
• ½ cup light brown sugar
• 1 egg
• 1 teaspoon vanilla extract
• 6 tablespoons unsalted butter, at room temperature
• ¾ cup powdered sugar
• 3 tablespoons heavy cream