Easiest way to add calories for now is with oil. Get a light olive oil (or another oil high in monounsaturated fat) and add ~1 tablespoon to each shake. Assuming 4 shakes per day, that’s an extra 500 calories. Make sure to not use a virgin or extra-virgin oil, as that’ll nastily impact taste.
You can experiment with some different oils too - rapeseed may be better than light olive for texture, though may somewhat affect taste.
Desiccated coconut is too gritty for shakes in my experience, but coconut milk powder that has a high oil content (best one I’ve found is this one: https://www.realfoodsource.com/product/vegan-coconut-milk-powder-65-oil-content/ ) works really well. You’ll want to mix it in with the powder before adding any water, and it clumps easily so you’ll need to push it through a siiv to break it up, but once mixed with the powder it won’t clump. That should do the trick.
I’m using olive extra virgin and I blend it, not noticed any different taste… however I am still hungry with 4 scoops so I have to eat a sandwich or something else…
I am quite thin and loosing weight since I am drinking huel (80% huel 20% food) that’s why I wanted an extra calories huel to be ready though.