Destone the Medjool dates and chop them up into reasonably small segments.

Add them to your blending jug, with a little water, and leave them to soak for up to half an hour.

Pour the water into a separate cup and add back two or three teaspoons of water to the dates.

Blend. When the blender stops turning, add a spoon more of water, and mix with your dates, until it is slightly thinner again. Reblend.

Repeat the last step until you have the consistency you want. Runnier or thicker, it's all up to you.