This is "THE" frothy, buttery drink
served in Hogsmeade...
a favorite of Harry, Hermione and Ron!
Root Beer Soda
Place 1/4 cube of butter in a microwave-safe bowl and melt it. Pour Root Beer soda into a tall microwave-safe glass and heat on 50% for 30 seconds or as needed so it is moderately warm. Warning: If it is warmed too much, it won't be fizzy or taste good. Pour 1 teaspoon of melted butter into the Root Beer a little at a time, stirring constantly. After butter and Root Beer is well blended, gently add a little bit of cream and stir. It may take a few times to determine the amount of butter and cream needed to make the perfect-tasting ButterBeer!