• brown sugar
• butter, unsalted
• chocolate
• cocoa powder
• confectioners'/powdered sugar
• cornstarch
• eggs, large
• granulated sugar
• heavy cream
• milk
• buttermilk
• oats, old-fashioned rolled & quick-cooking
• oil, vegetable
• peanut butter, Jif or Skippy

Source: Sally's Baking Addiction by Sally McKenney