This is a classic oatmeal chocolate chip cookie recipe, so one of the easiest changes would be to make another type of cookie. However, you would need to make sure that the cookie bakes enough so it doesn’t crumble when you attempt to make the dentures. You can also switch out the type of chocolate chip you use, or make a vampire with blue gums instead of red. Or, go really crazy and make black cookies with some food coloring and use orange coloring for the frosting. It’s Halloween! Do whatever you want!