Today’s post is the third new cookie recipe in as many weeks…except that it’s not new at all. These Fluffernutter Sandwich Cookies are made with the gluten-free cookie base of my Lindor Truffle Peanut Butter Blossoms and the marshmallow filling from my homemade Oatmeal Creme Pies. Put ‘em together, and you’ve got a sandwich cookie that is stupid easy and crazy delicious.

This cookie recipe is based on the Fluffernutter Sandwich, which is a perfect food as far as I am concerned. It doesn’t get much better than peanut butter and marshmallow fluff! That rich, creamy, sweet and salty combination is one of the greatest lunch treats out there. And make no mistake, it is a treat. While peanut butter (the natural kind, anyway) is pretty good for you, marshmallow fluff definitely isn’t! Good thing this is a dessert blog–this magical combination is much more suited to a cookie than a main course.

Fluffernutter Sandwich Cookies come together quickly and easily. The cookies are my spin on the classic three-ingredient peanut butter cookie recipe. My version has six ingredients; aside from the usual peanut butter, egg, and brown sugar, this recipe has vanilla for flavor and cornstarch and baking powder to give the cookies a chewy texture. There’s no flour or butter in this dough or in the filling, so this recipe is free of gluten and dairy 😍

Scoop the dough by the 1/2 tablespoon (1 1/2 teaspoons), roll it into balls, and flatten slightly. They may crack slightly, but that’s sort of a necessary evil here. This dough doesn’t spread much, so the flattening helps the cookies to bake into a shape that lends itself to sandwiching. 

And speaking of sandwiching…once the cookies are baked and cooled, make the filling. Cream together marshmallow fluff and shortening. Beat in some confectioners sugar, salt, vanilla, and hot water until a smooth, sticky filling forms. Load it into a zip-top plastic bag and snip off a corner.

Pipe dime-sized dollops of marshmallow filling onto half of the cookies and top them with the rest of the cookies.

Y’all. Y’ALL. These Fluffernutter Sandwich Cookies are SO GOOD. The cookies are chewy and peanut buttery and the filling is marshmallow magic. Together, they are rich, sweet, salty, gluten- and dairy-free, and irresistible!



Fluffernutter Sandwich Cookies {Gluten-Free}
makes about 2.5 dozen very small sandwich cookies

Cookies:
1 1/2 cups creamy-style peanut butter (not natural-style)
1 1/2 cups light brown sugar, packed
1 large egg + 1 large egg yolk, room temperature
1 teaspoon pure vanilla extract
2 tablespoons cornstarch
3/8 teaspoon baking powder

Filling:
4 oz marshmallow fluff (about 1 cup)
1/4 cup shortening,* room temperature
1/2 cup confectioner’s sugar
1/4 teaspoon Kosher or sea salt
1/2 teaspoon real vanilla extract
1 teaspoon hot water (from the tap is fine)

Preheat oven to 350F. Line two baking sheets with parchment. Set aside.

In a large mixing bowl, use an electric mixer to beat peanut butter and light brown sugar until combined. Mix in egg and yolk, followed by vanilla. Beat in cornstarch and baking powder.

Scoop dough in 1/2 tablespoon (1 1/2 teaspoon) increments and roll into balls. Place dough balls at least 1.5 inches apart on prepared pans and flatten lightly with your fingertips. Bake 6 minutes, until no longer shiny. Let cool ten minutes on the pans before removing to a rack to cool completely.

To make the filling, cream the marshmallow fluff and shortening with an electric mixer until light and fluffy. Beat in confectioner’s sugar and salt. Add in vanilla and hot water and mix on high until the filling is very fluffy.

Assemble sandwich cookies. Load filling into a piping bag or zip-top freezer bag and snip off a small corner. Pipe a dime-sized dollop onto the middle of the underside of one cookie. Top with a second plain cookie, with the underside filling-side-in. Repeat with all remaining cookies.

Cookies will keep very well covered at room temperature for up to a week.

Note:

You may use an equal volume of softened butter in place of shortening. This will mean that your cookies are no longer dairy-free.