Well what I do is chop up banana and whack them in the freezer(peel and chop it first,I made that mistake and put a whole banana in the freezer lol). Then you put frozen banana, about 200 ml of milk, two decent handfuls of spinach and a wee teaspoon of peanut butter (optional) and then blitz it till its smooth. And it doesn't taste of spinach at all-if you google them you can see loads of variations, they are so refreshing cos the banana was frozen it keeps it lovely and cool. That one I had this morning was 8.5 syns as I used milk as a hea, but to be honest I'm not going to bother using peanut butter anymore, waste of syns really, and you don't miss it if its gone. I also usually use almond or soy milk, but I didn't have any today, so from now on il just use banana and it'll only be 4 syns with milk as hea. If you want to use more milk, just use more spinach too-you can't really go wrong with it, and you can make it thicker or thinner depending in quantities-tastes lovely thicker or thinner!