Preparation

• Preheat the oven to 350 degree F and lightly grease three 12-count mini muffin pans.
• In a large bowl, mix the cake mix, eggs, canola oil, and black food coloring (if using) until well combined.
• Scoop about ½ tablespoon of dough and place in the mini muffin pans. Flatten the dough with your fingers.
• Bake for 8-10 minutes or until the edges are set. Remove from the oven and immediately press an indentation into each warm cookie using the back of a 1 tablespoon measuring spoon. Set aside to cool completely.
• While the cookie cups cool, make the buttercream. In a medium bowl, beat the butter until creamy. Gradually add powdered sugar, vanilla, and salt, beating until smooth. Add milk a little at a time until the buttercream is smooth and pipeable. Mix in green food coloring until the desired shade is reached.
• Pipe the buttercream into the cooled cookie cups, filling each to resemble a bubbling potion.
• Decorate with green sprinkles, candy eyeballs, and Halloween sprinkles. Break pretzel sticks in half and insert one into each cookie cup as a stir stick.
• Serve and enjoy!