The THC saturation point in Butter

Ive made cannabutter four times now, each time using the ratio of 1 ounce of potent shake to 1 pound of butter, the most ive ever used being 5 ounces.

The butter produced usually makes about 60 fairly strong cookies, not superpotent, but they get you faded.

I feel comfortable enough now with my method to start playing with the recipie, and decided to make some double serving fairly potent cookies.

I know it would depend on the type of cooking materials, but baisically my question is at what point do you have too much weed for butter, how much thc can the butter hold?