Our son was fortunate enough not to have ever developed a taste for cows milk, however it was important for us friends and family would enjoy the same food as him. Our whole family follows the same diet.
We use "Soy Milky" for all cooking. It makes delicious custard, mashed potatoes with nutalex as butter Substitute.
So Good ice cream also is consumed by visitors without complaint and some times without even being noticed...
Wishing you all the best.