Preheat oven to 350 degrees

Using a large bowl, combined the flour, baking soda and cream of tarter

Gradually add in the dry ingredients and mix on low speed

Using your hands continue to mix until fully combined

Roll out the dough to about 1/2 inch thick

Cut out 12 circles and place onto a cookie sheet

Bake for 8 minutes or until lightly golden brown

Repeat steps until completely out of dough

Let cookies cool completely

Using the standing mixer, combine the egg whites, cream of tarter, vanilla and powder sugar and mix until combined and stiff peaks form

Scoop 1 C of icing into another bowl and mix in a few drops of black gel coloring. Add in a few more drops of black to get the shade you want.

Scoop some white icing and black icing into the piping bags and set aside

Add in a few tablespoons of water into the remaining white icing and mix until combined

Using the white piping bag, pipe a outline around the cookies

Fill in with the thinner white icing

Let cookies dry overnight

Using the black piping bag, pipe the detail of Jack Skellington's eyes onto the cookie and fill in

Pipe a line for a smile onto the bottom part of the cookie

Pipe small lines for stitching onto the line for the smile

Let cookies dry for an hour before enjoying.