Vacuum Coffee Brewers
Though slightly more laborious, vacuum brewing is great fun to watch and experience. One troubleshooting tip: If the coffee fails to siphon back into the bowl, either the coffee is too finely ground and has blocked the filter, or the vacuum seal didn’t form properly. If the latter is the issue, be sure that the funnel, when inserted into the bowl, fits snugly. Twisting it into place can help make the seal more secure. If the problem persists, you can even try using a wet rubber seal.
Quick Tips:
- Grind: Vacuum (the finest grind achieved without clogging the filter)
- Coffee-Water Ratio: 1 level tablespoon: 5 ounces
- Brewing Time: Under 5 minutes total
- Water Temperature: 195° F, just off a boil
For this method, Tully’s recommends: