Can I make the cold foam without heavy cream?
Yes. Use 1/4 cup of cold oat milk or coconut cream whisked vigorously with the cinnamon and vanilla syrup until frothy, though it won't hold as long as cream-based foam.
How do I shake this without a cocktail shaker?
Use a mason jar with a tight-fitting lid. Fill halfway with ingredients, seal, and shake vigorously for 10-15 seconds until chilled and slightly aerated.
Can I make this drink hot instead?
Yes. Skip the ice, use hot espresso, warm oat milk, and omit the cold foam. Stir in brown sugar and creamer, then top with warm cinnamon vanilla foam if desired.
How far in advance can I prepare the cold foam?
Cold foam is best used immediately after whisking. It can hold for 10-15 minutes in a cold glass before deflating.
What if I don't have brown sugar coffee creamer?
Use 1 tbsp of vanilla creamer plus an extra 1/2 tsp brown sugar, or replace with sweetened condensed oat milk.