Hello - if anyone's still out there!!

My LO is also suspected of having a cow's milk protein allergy. He's still BF but has been prescribed pepti-junior as I wanted to introduce a bottle and my EBM doesn't keep for long (a very sickly reaction to normal formula made us stumble over this probable allergy). Anyway, could I use that milk in cooking??? I've heard you can make up porridge etc with it, but not thought whether I could use it for recipes. Would that just be weird? It stinks and so far he's not been a fan (don't blame him!)
I've not had to give up dairy thank goodness but I do notice he does tend to have sickier days if I've had pizza or too much ice cream so avoiding those for the majority. I'm waiting for a dietician appt as so far not introduced anything into his diet just in case, not sure what I should be doing really...
xx