Using an electric mixer, combine the butter, sugar, egg yolk, and vanilla. Mix flour and salt together in a separate bowl and add the mixture to the wet ingredients, little by little, stirring until incorporated and the dough begins to firm up.
Take 1 teaspoon of dough and form into little balls. Place balls on a lined baking sheet. Press each ball down with your palm or the bottom of a glass.
Bake for about 8-10 minutes. Let the cookies cool on a baking rack.
While the cookies are baking, combine the marshmallow cream and cream cheese in a bowl using an electric mixer. When the cookies are cool, spread a dollop of marshmallow frosting on half of the cookies. Top each frosted cookie with another cookie to make a sandwich.
Roll the frosting-exposed portion of each cookie sandwich in a bowl of mini chocolate chips.
Notes
You'll use about ½ of the filling. Nutrition stats are calculated using half of the filling ingredient amounts. Serving size: 1 sandwich cookie Nutrition Information (per serving) from Caloriecount.about.com Calories: 183 Fat: 10.6g Carb: 20.4g Fiber: 1.8g Protein: 2.5g Sugar 7g Sodium: 130mg
Recipe by Destination Delish at https://www.destinationdelish.com/mini-smores-sandwich-cookies/