If you're interested in pushing the envelope and expanding the flavour of your beer, it turns out you don't have to do a complicated soak or extract a bunch of oils. All you need is a coffee plunger.
The coffee plunger is useful for more than just your morning cup. Over at Serious Eats, Luis Tovar uses one to add even more flavour to his beer. All it takes is a few extra ingredients, three minutes of infusion time and a press. You could even do the whole thing in the fridge if you're worried about losing carbonation or warming your beer.
You can say that if you're drinking a beer that you think needs more flavour infused into it, you should try another beer, but we have to applaud Luis's creativity here. He goes through six different already-great beers and infuses each one with additional flavour by adding ingredients such as ginger, grapefruit, hops, coffee, lime and mint. Hit the link below to check out some of the combinations and get instructions on how to do it at home.
Use A French Press to Add flavour to Your Beer [Serious Eats]