200g dairy-free margarine
200g castor sugar
200g self-raising flour (113)
125g porridge oats
40g cocoa powder
300g block of dark dairy-free chocolate
Heat oven to 180 degrees. Melt margarine in a pan. Mix dry ingredients together and stir into melted margarine. Press into a swiss roll tin. Cook in the centre of the oven for 15 minutes (take it out even if it doesn't look cooked - if it stays in too long it goes rock hard).
Cool in the tin and add melted chocolate whilst it's still warm, as it will stick better.
Remove from tin and slice into desired size cubes. Enjoy!