While Michelle Polzine's San Francisco-based 20th Century Cafe closed its doors for the final time in 2021, her 2020 cookbook "Baking at the 20th Century Cafe: Iconic European Desserts from Linzer Torte to Honey Cake" is still available. While there are plenty of delicious sweet recipes in the book, one stands out — hot butterscotch.

Polzine’s recipe calls for a mix of brown sugar and light muscovado sugar, unsalted butter, whole milk, cream, salt, water, and dark rum. Polzine's instructions initially call for stirring the sugar and butter mixture as you typically would when making butterscotch, but she also advises that the sugar should smoke slightly.

When you sense a sweet aroma, it's time to finish making the butterscotch beverage by whisking in the remainder of the ingredients. The recipe, which serves 8-10, only calls for two tablespoons of rum, but adding more sounds like a solid way to start a wintertime soiree.