How long ago did she ingest the grease?
I would go ahead and try to get her to empthy her stomach and vomit that up. 2 hours is usually the limit you can do this, so go ahead and try this right away. You can give her 6 ounces of hydrogen peroxide by mouth - if you don't have peroxide then give her 3 tablespoons of salt by mouth. She should vomit in 20 minutes or so. If she doesn't you can repeat one-half dose.
The grease can cause pancreatitis and I would watch her for signs of vomiting, diarrhea or poor appetite. If you see any of this, take her in to your vet so they can check her for pancreatitis with a quick blood test and get treatment started. At a minimum I'm sure she will at least have an upset GI tract. Unwillingness to eat is usually a sign you need to go to your vet.
Hopefully she will get most of the grease up and not have much trouble with this. Don't give her any more food or water tonight. Just let her stomach settle after she vomits until morning and resume normal diet.
Let me know if you have more questions,
You can squirt the peroxide in with a turkey baster or medicine dropper. The salt you just aim her nose up in the air, open her mouth and pour it in. It makes quite a mess with some of it falling out.