Well, I tried the chocolate oat cakes (really biscuits).
They weren't so easy to make as I expected, the mixture wouldn't come together and I had to add more milk that I expected.
When they came out and had cooled I tasted one and, oh dear, not nice. Bitter. So I went back to the recipe and realised that I'd misread and added rather more cocoa powder that I should have done. Doh!
So I had another go, because I felt that it had potential. this time i made half quantities (just in case) and also I went very non-ration and added some orange oil (choc'n'orange - yum). Much easier to handle and this time rather nice. Not too sweet but not bitter either and nice and crunchy. So a success.
However, I had 25 unsuccessful cookies to deal with and I had an idea. The recipe is rather similar to a crumble topping but with milk added. So I zizzed all the cookies back down to a rough powder and have frozen it in small portions for crumble topping. I can add extra sugar to counterbalance the bitterness, if I want to, and I think it will work well. if not, I'm no worse off, am I? It might also go nicely in a yogurt or as an an ice cream topping.
We will see!