These Witch Cauldron Brownies are the easiest Halloween treat to make and will elevate your spooky spread to another level with just a few simple steps. Top store-bought brownie bites with cream cheese frosting, sprinkles and a pretzel stick to create these yummy, little desserts. You can change the color of your frosting by experimenting with food coloring. There are Halloween sprinkles in almost every store during the season that you can choose from.