Use frozen strawberries, not fresh — fresh berries release too much liquid and turn the drink watery. Don't over-blend: stop the moment the texture looks thick and pourable. For a dairy-free version, use coconut sweetened condensed milk and freeze coconut milk into cubes to replace half the ice. Leftovers are better frozen into popsicle molds than kept in the fridge; the froth disappears after a few hours. A tiny pinch of salt is not optional — it rounds out the sweetness.