You can substitute the strawberries with frozen watermelon, peach slices, raspberries, or a mix of different fruits. For a stronger cocktail, add 120 ml of vodka or tequila. Taste and adjust sweetness as well as lemon or lime juice as needed. Frozen fruit works just as well as fresh and is available almost year-round. If using fresh ripe strawberries, freeze them for about an hour before blending. Try it before sweetening — you may not need any added sweetener at all.
For a uniform slush without coarse ice chunks you need a blender that can process frozen strawberries and ice cubes into fine snow in seconds — a weaker countertop or bar blender will break the frozen mass unevenly, causing ice shards and liquid to separate quickly. The Vitamix cuts through the frozen mass evenly with high blade speed before frictional heat can re-liquefy it. Make sure to use the tamper: it pushes the dense mass continuously toward the blades — without it, an air pocket forms and the upper portion of the frosé remains unblended.
For a non-alcoholic version, use alcohol-free rosé or a mix of grape juice and sparkling water. Enjoy this cocktail in moderation — it is intended for adults.