These are simple sugar cookies with royal icing.
I even made some vegan ones for my vegan friends this year!
OK I sort of cheated when I was making the vegan ones... my friend Andrew got me a vegan sugar cookie mix and vegan butter, so I made it according to the box. I didn't have regular soy milk around the house, so I used the peanut rice milk drink we had in the fridge. The cookies turned our really well! I found a vegan royal icing recipe online, which was pretty much powdered sugar, corn syrup, and water and vanilla all stirred together. The finished icing worked very well, too.
Hope everyone is having a safe and happy Halloween!