Fluffernutter Sandwich Cookies Recipe

Name: Fluffernutter Sandwich Cookies Recipe
Ingredients: For the Cookies:; 1 and 1/4 cups (6 1/4 ounces) all-purpose flour; 1/2 teaspoon baking soda; 1/2 teaspoon ground cinnamon; 1/4 teaspoon salt; 10 tablespoons (1 1/4 sticks) unsalted butter, softened to room temperature; 1/2 cup (about 4 1/2 ounces) dark brown sugar, firmly packed; 1/4 cup (about 1 3/4 ounces) sugar; 3/4 cup creamy unsalted peanut butter; 2 large eggs, lightly beaten; 2 teaspoons vanilla extract; 1/2 cup quick oats; For Assembly:; 1/2 cup creamy unsalted peanut butter; 1/2 cup marshmallow cream