I would like to be able to grind my own flavored coffee beans - hazelnut, French vanilla ect.. However, I don't want to buy the coffee beans that are already flavored but would rather try to recreate the infusion method at home. Does it involve soaking the beans, for how long, at what temperature.....
Coffee shops flavor their beans by taking plain roasted coffee, and adding flavoring oils to them. After the oil is tossed with the beans, they are left alone to allow the flavor to soak in for at least 30 minutes.
The coffee flavoring oils are a lot like candy flavoring oils. Although I haven't tried it, I bet you could use those to flavor your beans.
In the land of everything available through the internet, I'd bet you could purchase these coffee bean flavoring oils on-line, and in small quantity. (We bought HUGE jugs of the stuff for the shop!)
I haven't worked in the coffee shop for over 10 years now (since becoming disabled in an unrelated accident), so I can't remember the exact ratio of flavoring to beans. I want to say that for every 1 lbs of beans, we mixed in .03 lbs of flavoring. I don't know what that comes out to be by volume, as we did everything by weight.
You can also add flavorings into the coffee grounds when in the filter: cinnamon, cloves, nutmeg, orange rind, crystallized ginger, etc. As the coffee brews, it picks up the flavoring.
Just add the flavor to the brewed coffee; there is no particular advantage in flavoring the beans in advance. Any good brand of flavoring syrup like you see in a coffeehouse can be added to the pot or cup.
We've developed a new way to flavor coffee. It's called "INBRU" and it let's you flavor any coffee - dark roast, light roast, decaf.. - in the brew basket. It's made from recycled American rice hulls and it's pretty amazing. Inbru adds no calories or sweetness. Inbru is not a "whitener." It's simply a way to flavor coffee as you desire. You can check it out at inbru.com