In a standing mixer: combine butter, powder sugar, egg and vanilla and mix on medium speed until combined and fluffy
In a large bowl: combine the flour, baking soda, and cream of tartar.
Gradually add in the flour to the wet mixture and mix on low speed until combined
Once all the flour has been combined with the wet ingredients, sprinkle some flour onto a cutting board and knead with your hands till everything is combined
Sprinkle flour onto the cutting board and roll out the dough to 2 inches thick
Use the cookie cutters and cut your shapes (circles)
Bake in the oven for 7-9 minutes or until slightly golden brown
Place onto a wire rack to cool
Royal Icing Directions:
Using the standing mixer, combine the egg whites, cream of tartar, powder sugar and vanilla and mix on medium speed until stiff peaks form
Split the icing into three bowls
In one bowl, add a few drops of the leaf green food coloring and mix until combined.
Scoop some icing into a piping bag and set aside
Add about 2-3 tbsp of cold water to the bowl and mix until combined. This will thin out the icing so that it will be easier to flat ice the cookies.
Pour thinned icing into a squeeze bottle and set aside
In another bowl, add a few drops of black food coloring and mix until combined. Add a few more drops of food coloring to get the shade of black that you want
Scoop some icing into a piping bag and set aside
Add about 2-3 tbsp of cold water into the remaining black icing and mix until combined
Pour into a squeeze bottle and set aside
Scoop some white icing into a piping bag and set aside
Decorating directions
Using the black marker, draw a small circle onto the cookie about 1 centimeter from the edge of the cookie. This is where you will be filling in with your green icing.
Using the green piping bag, pipe a line around the smaller circle.
Fill in with the thinned icing
Using the green piping bag, pipe dots around the edge of the green circle.
Let dry for an hour
Using the black piping bag, pipe dots in between the green dots.
Using the black icing, pipe an outline for Hulks face onto the center of the green circle
Fill in the part for his hair.
Using the white piping bag, pipe on dots for the eyes and fill in the small part of the mouth.
Using the black piping bag, pipe on smaller dots for the pupils.
Let cookies dry for about 2 hours before enjoying!