Mcds porridge is oatsosimple so if it's the original one then u can use that as ur heb! Not sure what milk they use but shud be within ur allowance! Hope this helps x
Iv had my porridge was yummy. Im sure the pCket they use is the 28g ones. Also ive smuggled the porridge pot out to measure how much milk they put in as theres a line saying we fill milk to here i WILL know for sure lol xxx