For the vanilla simple syrup: (can be made well ahead)
Add the water and sugar to a small saucepan. Heat over high heat, stirring until the sugar dissolves. Bring to a boil and let boil for 1-2 minutes. Remove from the heat and stir in the vanilla. Transfer the mixture to a jar and refrigerate until no longer warm before using. Vanilla simple syrup can be stored in the refrigerator for up to 1 month and makes enough for 8-16 coffees.
To make a vanilla sweet cream cold brew coffee:
Make your cold brew coffee and pour over ice in a large glass or pour slightly cooled brewed coffee over a glass full of ice cubes. *If you prefer a sweeter iced coffee, add about 1 Tablespoon of the vanilla simple syrup directly to the coffee.
Tip! I find the cream froths better when it is super cold, so I like to pop the jar with the cream into the freezer for 5 minutes before frothing.
Add the Half and Half cream and 1 Tablespoons of the vanilla simply syrup to a small jar or container. The jar should be big enough to allow the cream to triple in volume, but not so big that the cream is too shallow in the jar. Using a hand-held frother, froth the cream for 1-2 minutes or until it is thickened into micro foam. (See notes below for other frothing options.)
Pour the foam over the coffee and enjoy! (Leftover cream mixture can be refrigerated and re-frothed later.)
Tip! The perfect cold foam is thickened enough that it will sit on top of the coffee. If your cold foam is thin, experiment with different frothing vessels or methods.
Notes
Note 1: Or use 1/2 whipping cream with 1/2 whole milk.Note 2: If you prefer a sweeter iced coffee, add a Tablespoon of the vanilla simple syrup directly to the coffee, as well.Hand-held battery-operated frothers are widely available for about $10 and are well worth picking up if you enjoy making coffee drinks at home. If you don't have a frother, you can shake the mixture in a lidded jar or whisk it by hand with a whisk.Be sure to read the notes above this Recipe Card, for more tips on making this recipe.