Dial in your espresso,
the Hoffmann way.

Iced espresso drinks need little change (Hoffmann): brew the shot hot, then pour over ice in a bigger glass with cold milk or water. Colder and diluted tastes more bitter, so they're often sweetened a touch — your call. Ice amount is to taste; the ratio stays the same.

Ratios from James Hoffmann, How to Make the Best Coffee at Home. Guides, not rules — dial to your taste.