Starbucks makes theirs with 2% milk but you can use any milk you like.
Milk will increase in volume when steamed or frothed, so to get 1 ½ cups of frothed milk for this recipe, use 1 cup of cold milk (dairy or non-dairy).
If you don’t have an espresso machine or a Nespresso, you can use instant coffee. Combine 1 tablespoon of instant coffee and 1/4 cup hot water to replace the 2 shots of espresso in the recipe.
Make a batch of homemade vanilla syrup ahead of time. It'll keep in the refrigerator for up to 2 weeks.