I was really surprised by the positive reaction on Twitter for my Jack Skellington Pizza, so I wanted to share how I made it. My apologies that I did not take photos of each step, but I hope the photos and descriptions provided will be helpful.
Step 1: Make Your Dough
You can use any pre-made dough or make your own. My favorite recipe is from King Arthur: http://www.kingarthurflour.com/recipes/the-easiest-pizza-youll-ever-make-recipe (I use the saf red instant yeast option). I made the dough a day ahead of time and put it in the refrigerator after letting it rise for about an hour and a half.
Step 2: Shape Dough
Once the dough is ready and you are ready to construct your Jack Skellington Pizza, the next step is to form a flat, regular circle pizza. The size will vary due to your pizza pan. Use about 3/4ths of the total dough to make the crust. The extra 1/4th will be used to form Jack's eyes, nose, and mouth.
Step 3: Molding Jack's Face
Now the fun part. I used a can of sliced black olives for the dark spots on Jack's face and dough to form his mouth, nose and eyes. Feel free to use a reference photo if you're not sure how big his eyes and smile are supposed to be.
Eyes: Roll dough to form cylinder shapes, two thicker ones and two thinner / shorter ones. Place the thicker cylinders to form the top of Jack's eyes and the thinner ones to form the bottom of his eyes. Fill the eyes with olives (or your topping of choice). Make sure you press it in so it doesn't break off during baking.
Nose: Use a few blocks of dough to form Jack's Nose - an upside down "V". Place olives to form his nostrils. Then take a small piece of dough for the middle of Jack's nose. Make sure you press it in so it doesn't break off during baking.
Stitched Smile: Place the olives to form a regular smiley face smile. Jack's smile extends in a full semi-circle on the bottom of his face. Then use the slice olives to form the stitches in Jack's smile. For the raised part of his mouth: roll out down and cut small rectangles and press them in between the sliced olives (the stitch part of the smile).
** If you are going to wait to bake your pizza, at this point you can put it in the fridge until you are ready to put it in the oven.
Step 4: Time for Cheese
Once you have Jack's face the way you want it, it's time to add the cheese. You can sprinkle the dough with a little olive oil first, but it is not necessary (You could also use pasta sauce. I have no idea how the finished product with pasta sauce will turn out, as I made it a white pizza and then had sauce for friend's to dip their pizza). When sprinkling cheese make sure to avoid the olive spots as best as you can.
Bake the pizza at 450 for 15 to 20 minutes, until it's golden brown, the toppings are hot and bubbly, and the cheese is melted. Remove the pizza from the oven.
Step 5: Ta Da!
And here is my final result. I didn't use a trick to get the dark spots, but since the cheese is higher at spots, it will brown quicker.
Step 6: Sliced and Ready to Eat
Here is how we sliced the pizza. Again since this was a white pizza, we had the option of pizza sauce on the side for those who wanted to dip their pizza.