When my children were newborns and they had gas, we would put a little anise seed into some water in their bottles to settle their tummy and de-gas them. It worked every time.
Whenever anyone in the family has gas, we pop a tsp of anise seed into the mouth and chew it thoroughly, swallow it. It will completely stop the gassiness, and very quickly, too. I don't have exact measurements, but I'd say 1/2 teaspoon of whole seed. Chewing it thoroughly is important, and swallow it.