Almond Milk for 6 month old

Me

So with Thanksgiving right around the corner I’m thinking about what my 6 month old can eat with our family at thanksgiving dinner. She has a dairy allergy so I was going to make mashed potatoes with margarine and almond milk for her to try, and I will be able to eat them as well then. Can she have it if it’s in a food? I know if it was regular cows milk and she didn’t have the allergy then she would be able too, but I’m not sure about a nut based milk. It’s 3 am and thus is what is keeping me up🤦🏼‍♀️