Extract Brewing Step by Step

What Is Extract Brewing

Extract brewing uses pre-made malt extract — either liquid (LME) or dry (DME) — instead of mashing grain. The mashing step has already been done for you at a maltster or extract manufacturer. This simplifies equipment requirements and reduces brew day time by 2-3 hours.

Equipment Needed

A 5-gallon brew kettle, a 6.5-gallon fermenter with airlock, a long spoon, a thermometer, a hydrometer, a no-rinse sanitizer, and a siphon. That is all you need to start.

Step 1: Steep Specialty Grains

Many extract recipes include crushed specialty grains (Crystal, Munich, Chocolate) for added color, body, and flavor. Place the grains in a muslin bag, suspend it in 2-3 gallons of water, and heat to 155 F (68 C). Hold for 20-30 minutes, then remove the bag and let it drip — do not squeeze it, which can extract harsh tannins.

Step 2: Bring to a Boil

Add water to reach your boil volume (typically 3-4 gallons for a partial boil) and bring to a rolling boil. Remove the kettle from heat before adding malt extract to prevent scorching. Stir DME or LME until fully dissolved, then return to heat.

Step 3: The Boil

Boil for 60 minutes. Add hops according to your recipe schedule. A 60-minute addition provides bitterness. A 15-minute addition contributes flavor. A 0-minute (flame-out) addition delivers aroma. Watch for boil-overs during the first few minutes — extract worts are prone to foaming.

Step 4: Cool the Wort

After the boil, cool the {{glossary:wort}} as quickly as possible to fermentation temperature (65-70 F for ales). You can use an ice bath (place the kettle in a sink full of ice water) or an immersion wort chiller. Fast cooling reduces the risk of infection and improves protein coagulation.

Step 5: Transfer and Top Off

Pour or siphon the cooled wort into a sanitized fermenter. Top off with cold, pre-boiled water to reach 5 gallons total volume. This dilution is normal for partial-boil extract brewing.

Step 6: Pitch Yeast

Take an original gravity reading with your hydrometer. Aerate the wort by shaking the fermenter vigorously for 2-3 minutes — yeast needs oxygen for healthy growth. Sprinkle dry yeast directly on top of the wort, or pitch a liquid yeast starter. Seal the fermenter and attach the airlock.

Step 7: Ferment

Place the fermenter in a location with stable temperature (65-70 F for most ale yeasts). You should see airlock activity within 12-24 hours. Leave the beer alone for 10-14 days. Resist the urge to open the fermenter.

Common Extract Pitfalls

Scorching extract on the kettle bottom (remove from heat before adding), under-pitching yeast (use the correct amount for your gravity), and fermenting too warm (produces harsh, fusel alcohols). Avoid these three mistakes and your first extract batch will likely surprise you with its quality.