Peanut Butter Sandwich Cookies | America's Test Kitchen

Ingredients

• 1 1/4 cups (6 1/4 ounces/177 grams) raw peanuts , toasted and cooled
• 3/4 cup (3 3/4 ounces/106 grams) all-purpose flour
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 3 tablespoons unsalted butter , melted
• 1/2 cup creamy peanut butter
• 1/2 cup (3 1/2 ounces/99 grams) granulated sugar
• 1/2 cup packed (3 1/2 ounces/99 grams) light brown sugar
• 3 tablespoons whole milk
• 1 large egg
• 3/4 cup creamy peanut butter
• 3 tablespoons unsalted butter
• 1 cup (4 ounces/113 grams) confectioners' sugar