Yep. Fat's good for you. Butter is actually a very healthy fat - it contains medium chain triglycerides, which actually help your body release fat. Coconut oil is even higher in MCT. There's nothing wrong with saturated animal fat.
The only truly bad fats are the trans fats - avoid those like the plague.
And read here if you need more info on fats:
http://www.westonaprice.org/know_your_fats/oiling.html