Heat 5 oz water or milk in the microwave or on the stove. Mix in hot chocolate packet and stir until dissolved.
Mix in 2 oz of preferred liquor, either Bailey's Irish Cream or Kahlua. If making a mocktail, skip this step.
If using, add ½ oz of chocolate syrup to the potion bottle if using. If serving in a glass, make pretty patterns on the glass itself.
Add the drink to the potion bottle or glass. Garnish with dehydrated mini marshmallows as desired.