Put heavy cream, milk, matcha, and vanilla syrup into a French press. Mix well.Matcha can clump, so whisk or mix the matcha in the cream and milk. A handheld milk frother does the job quick.
Place lid and move the plunger up and down 40 times.The cold foam will increase in volume.
Use matcha in the $20-$30 range for any matcha drinks made with milk. Any less expensive and it'll be more brown than green in color.
In order to get cold foam like at Starbucks, the secret is to create tiny, uniform bubbles in the mixture. A French press works well for recreating this kind of cold foam at home. An electric milk frother with a cold setting also does a great job.
A handheld milk frother can also make cold foam, but the bubbles aren't as uniform. A French press creates nicer cold foam.
Remember that cold foam will increase in volume as it froths, so be sure not to overfill the French press.
Don't underfill the French press either, or the plunger won't reach the ingredients and it won't create cold foam. Make sure the filter is touching the liquid before moving the plunger.
Cold foam can be stored in a refrigerator for up to 2 days but it's best to use it right away.
Matcha cold foam can be topped on any iced drink in place of milk or sweeteners to give your drinks a sweet matcha taste. It can also be added to milky matcha drinks like Iced Matcha Lattes for a decadent touch.