Review: The Cumulus Machine

A first-of-its kind cold-brew machine that can make fridge-chilled nitro or “cold espresso” in a minute flat. Beautiful froth and crema. Easy use and cleaning. Succeeds significantly better than previous automatic cold-brew machines.

For maybe the first time in my life, I have received expert praise for my “foam situation.”

The foam in question was the bubbly top to a frigid espresso martini I’d just made in my home kitchen. And the “situation” was that there was a lot of it. The cocktail brimmed with satisfying crema as thick as the head on a Guinness—leading to kind words from an esteemed cocktail pro of my acquaintance.

This was surprising for lots of reasons. One was that I didn’t even have to shake the drink to get it frothy. The other was that the espresso in my drink had never touched heat.

Espresso ...