Spooky Cookie Cake

Gabe and I are invited to a Halloween party on Halloween night. I have to bring a dessert, so I did some online searching for cute Halloween ideas. There were tons of them, but most of them you need about 10 hours and some artistic ability to complete them. I just wanted something simple. So I found a cute cookie cake idea and decided to try it out. I started out by using the Thick and Chewy Chocolate Chip Cookie recipe I got from my friend. Instead of making cookie balls, I put all of the dough in a throw away foil pizza pan (12" size) and spread it out.
This is what it looked like before going in the oven:

I baked it at the same temperature she gave and just watched it for timing. I think I ended up baking it between 35-40mins. (note-after tasting it, it could have been less-it was a little over done for my taste). I think the recipe I found called for decorating it right after coming out of the oven. I decided to decorate it the following day.
For the decorating, I started by spreading about 1/2 cup of creamy peanut butter on top of the cookie (I microwaved it a little to melt it a bit). Then I sprinkled M&M's (halloween ones) and salted peanuts on top. To finish it, I used some vanilla frosting to create a spiderweb design on the cookie (I melted it a bit and used a baggie with a cut corner for piping it on). Here's the final result:

And after trying it, it was very tasty!