Sanitize all equipment thoroughly before use.
Boil 3 liters of water and dissolve the malt extract in it. Add the hops.
Simmer for 30 minutes, then cool the mixture quickly to 21°C (70°F).
Pour cooled mixture into a fermentation container with the remaining water.
Sprinkle yeast on top and seal the container with an airlock.
Ferment in a dark place at a consistent temperature for about 2 weeks.
Bottle the beer with a small amount of corn sugar, if desired for carbonation.
Store bottles at room temperature for another 1-2 weeks to carbonate.