While Butterbeer becomes more prominent later in the series, this recipe gives fans a chance to taste the most beloved beverage of the wizarding world, bringing a touch of Hogsmeade's charm to your book club.
In a saucepan, combine brown sugar and water. Bring to a boil and cook until it reads 240°F on a candy thermometer.
Stir in butter, salt, vinegar, and 1/4 cup of heavy cream. Set aside to cool.
Beat the remaining cream until slightly thickened.
For each drink, mix 1/4 cup of sugar mixture with 12 oz cream soda. Top with whipped cream.
Serve immediately.