The Tescos one is discontinued?! The swines!! That's the one I have, but at less than a tsp a day it does last a long time.
I had a look into this for you to see what I could come up with - they sell the one on the DD website, but it is RIDICULOUSLY EXPENSIVE!
So I compared a few:
Tescos Reduced-Fat (discontinued - but I wanted to compare...) Per 100g
Fat: 11g
Carbs: 14g (sugars): 1g
Protein: 24g
Cals: 250
Green and Blacks Organic
Fat: 20g
Carbs: 40g (sugars): 0g
Protein: 20g
Cals: 320
Bournville Cocoa
Fat: 21.7g
Carbs: 10.5g (sugar): 0g
Protein: 21.3g
Cals: 355
Dukan Cocoa (it's more than 7 quid!!!)
Fat: 1g
Carbs: 11.7g (sugars): 0.6g
Protein:24.9g
Cals: 239
Supermarket Cocoa (Sainsbury's)
Fat:20.7g
Carbs: 8.7g
(sugar): 0.5g
Protein: 19.8g
Cals: 358
It's bizarre. A friend just came back from Madagascar and brought me some actual Cocoa beans... how can grinding up the same beans produce such different results!?!
So it's your call if you wanna spend on the Dukan one. Personally, when my supply runs out, I'll probably go for something like the green and Blacks, because it tastes good, then just have it once every two days.
Other tips - I've been using alot of cinnamon lately and it's pretty good for yogurts and porridge (where you might have wanted to used cocoa). Also it's supposed to be an appetite suppressant, which is always good.
I'm sorry I haven't been much help. I do have one bit of advice though for those chocolate cravings..., I was just in the UK and when I was in a health shop I bought some Yogi Organic Choco Aztec Spice Tea. They are amazing. And No calories

Yippee!!
I just bought them in a generic health food shop, but they sell them in Holland and Barratt

and less than 2.50