This one is easily the most popular smoothie in our cafés. You need some baked rhubarb for this, so keep some back when you make a rhubarb crumble.

Put the rhubarb in a blender with all the other ingredients. Whizz it up until smooth and then taste for sweetness. Add some more honey or syrup if you think that’s what’s needed, and a splash of vanilla extract if you like.

Makes 2 tall glasses

2 sticks of rhubarb, cooked and cooled
1 tbsp honey or golden syrup
1 banana, chopped
140g plain yoghurt
100ml milk
vanilla extract (optional)