Pour plain kefir into an ice cube tray (about 2 tablespoons per cube) and freeze overnight. Keep these kefir cubes in a freezer bag for your smoothie.

Put the raspberries into the blender and puree them until smooth (you should have a rough raspberry puree).

Add the fresh mint leaves, honey, the remaining liquid kefir, and the kefir cubes to the blender. The mint gives a cool lift, and the frozen kefir cubes make it creamy.

Blend on high until the mixture is completely smooth and creamy. No chunks of raspberry or ice should remain. If it’s too thick, add a splash of more kefir or a little water; if it’s too thin, add more frozen kefir or a small banana.

Give the smoothie a quick taste. Add a little more honey if you want it sweeter. Blend again briefly if you added anything.

Pour into a glass and garnish with extra raspberries or a mint sprig if you like. Enjoy this frosty, flavorful smoothie right away for the best taste and texture.