Do be careful if you have a casein allergy or are lactose intolerant — some soy powdered milk alternatives contain casein or lactose. (glutenfreeonashoestring.com)
They both love all the recipes from both your books and since my daughter has celiac and casein allergy, they are all easy to adapt for the whole family to enjoy. (laurafuentes.com)
Side note, I used to have a casein allergy and I could eat butter without problems. (mynaturalfamily.com)