Open a mini Oreo cookie and scrape off the filling with a knife. Now you have a plain wafer for the Mickey ears.
Melt a cup full of candy melts in the microwave for 30 seconds at a time, stirring in between until it's fully melted.
Dip a toothpick into the melted candy and place a small amount in the bottom corner of a mini Oreo. Stick the wafer into the double stuffed Oreo to make the ears. Remove extra candy with a toothpick. Repeat and let dry.
Decorate your Mickey Mouse Halloween Cookies by adding a jack-o-lantern face with edible candy or dip the cookie into melted candy and add sprinkles. Get as creative as you want!