Bake cookies according to package instructions. I smoothed the dough into balls before placing on baking sheet. Make sure cookies are completely cooked through, no gooey centers. Allow to cool completely before manipulating into sandwiches.

For the frosting, use a stand mixer or hand mixer, cream the butter until fluffy. Add almond or vanilla extract.

Slowly add in powdered sugar, 1/2 cup at a time, beating with mixer continually.

Slowly add in marshmallow fluff, beating continuously.

To assemble, lay bottom half of cookie sandwich on flat surface. Scoop about 2 tablespoons of marshmallow frosting onto cookie. Place top half of cookie sandwich on the frosting, and press evenly with a flat hand to spread the frosting out. Use a spoon of spatula to swipe any frosting that hangs over the edge of the cookie.

Roll the cookie in sprinkles or other decoration if desired.