It was not intentional. Really.
I simply took out my 2 sticks of butter from the fridge, allowing them to soften on the counter before baking cookies.
Then I got busy.
Forgot the butter.
For 2 days.
And when I moved the butter, there were 2 perfectly stick-butter shaped stains DEEP in my granite.
Then I read everything on the internet that I could find about removing set-in grease stains from granite. There is actually a lot of reading material on this, so I was comforted to know that I'm not alone.
We went to the hardware store to find acetone to make a poultice (one method found online), hoping that would remove grease stains. We were advised against this method by the paint clerk.
We asked a granite salesman at the hardware store how to get rid of stains, to which he replied, "I've never heard of that happening before". Bah. No help there, either.
I settled on a cheap and seemingly harmless method: cornstarch and water mixed together to make a paste, let sit overnight to dry on the stain, wipe off in the morning. This actually worked to lighten the stain, but after 3 days of doing this constantly, I was ready for something more powerful.
And that's when I found this gem:
It's a little pricey for the pint-sized can, but really insignificant in comparison to replacing the entire slab of granite on my island...
So I bought it, followed the instructions exactly, and it worked!
If you have high-maintenance granite and make a mistake that results in a deep oil stain, get this stuff. It will stink up your house for a few days, but you will not have to replace your slab. :-)