Have you had ghee before? Heard of ghee before? It's used a lot in Indian and Ayruvedic cooking if not, and is the most incredible tasting thing ever!
Ghee (also known as clarified butter) is pure milk fat. It contains no lactose and no milk proteins, and for that reason it is generally well tolerated by most people, yes even those who show an allergy to other dairy products, and GAPS patients. For the same reason, ghee does not burn in your pan like butter can.