I have a subscription to a roaster who mails me a 250g bag of freshly-roasted, single origin coffee beans every week. To my taste, the beans are best within the first 20 days after roasting after which the aroma declines pretty quickly.
Sometimes, when I travel for instance, I end up with bags that I wasn't able to use by the time a fresher bag arrives. The older beans are not bad by any stretch-- in fact they are still far better than 99% of the beans that are sold in supermarkets which are generally a year old-- but I'd always rather use the fresher beans to make coffee if I have the choice.
Are there any good recipes or preparations that could put these once-fresh beans to good use?