Preheat oven to 350 degrees. Spray a cookie sheet with nonstick cooking spray.

In the bowl of a stand mixer, cream together fat, brown sugar, and white sugar.

Add in eggs and vanilla and beat until smooth.

Stir in baking soda, salt, and flour and mix until it forms a nice dough. Stir in chocolate chips with a spoon.

Use a large spoon to portion out a small cookie size. Use your hands to quickly shape into a dough ball and place on the prepared cookie sheet. Make 48 small cookies.

Bake in the preheated oven for 8 to 10 minutes, until starting to get a kiss of golden brown.

Remove and cool on the sheet for 3 to 5 minutes, then transfer to a wire rack to cool completely.

Once cooled completely, spread the bottom of one cookie with marshmallow cream and the bottom of another with nutella and sandwich together.