American lager is the beer style most homebrewers avoid, not because it is complicated to formulate, but because it demands patience most other styles don’t. The grain bill and hop schedule are actually simpler than an IPA or a stout. What makes lager brewing genuinely harder is the cold, slow fermentation and weeks of near-freezing conditioning that give the style its name and its clean, crisp character.
Why Lager Recipes Are Simple but Lager Brewing Is Not
A classic American lager grain bill is mostly Pilsner malt with a portion of flaked corn to lighten the body and dry out the finish, the same adjunct-driven approach most major commercial American lagers use. Hop character comes from noble varieties like Hallertau Mittelfrueh and Saaz, added for a clean bitterness rather than the aggressive citrus and pine punch of American ale hops. None of that is unusual or hard to source.
What separates a lager from an ale in practice is the yeast and the temperature. Lager yeast strains like SafLager W-34/70 or Wyeast 2007 Pilsen Lager ferment at 48 to 52 degrees Fahrenheit, roughly 15 to 20 degrees colder than a typical ale fermentation, and they need a noticeably larger pitch rate than ale yeast to avoid stress-related off-flavors at those low temperatures. After primary fermentation, the beer needs a diacetyl rest (a short warm-up period to clean up buttery off-flavors) followed by 2 to 4 weeks of cold lagering near freezing. That whole process routinely takes 6 to 8 weeks from grain to glass, compared to 3 to 4 weeks for a typical ale.
Full 5-Gallon Recipe Card
American All-Grain Lager (5-Gallon Recipe)
Ingredients
Grain Bill
- 8.5 lb Pilsner malt
- 1.5 lb Flaked corn
- 0.5 lb Vienna malt
- 0.25 lb Rice hulls optional, aids mash runoff
Hops
- 1 oz Hallertau Mittelfrueh 60 min, bittering
- 0.5 oz Saaz 10 min, flavor
- 0.5 oz Saaz 5 min, aroma
Yeast and Other
- 1 pack SafLager W-34/70 dry lager yeast or Wyeast 2007 Pilsen Lager liquid
- 1 tablet Whirlfloc or 1 tsp Irish moss 15 min
Instructions
Mash
- Mill the grains and mash in at a liquor-to-grist ratio of about 1.5 quarts water per pound of grain.
- Hold at 150 to 152 F (66 C) for 60 minutes for a lighter, more fermentable wort typical of American lagers.
- Raise to 168 F (76 C) for mashout.
Boil
- Sparge slowly with 170 F (77 C) water, collecting wort until your pre-boil kettle volume is around 6.5 gallons and gravity reads roughly 1.041.
- Bring to a rolling boil for 60 minutes and add your bittering hops at the 60-minute mark.
- Add Saaz hops with 10 minutes left, plus the Whirlfloc or Irish moss at the 15-minute mark, then a final Saaz addition at 5 minutes for aroma.
- Chill the wort as fast as possible down to 48 to 50 F (9-10 C), well below standard ale fermentation temperatures.
Ferment and Lager
- Pitch a large, healthy quantity of lager yeast (lager yeast needs roughly double the pitch rate of ale yeast) and ferment at 48 to 52 F (9-11 C) for 10 to 14 days.
- Perform a diacetyl rest by raising to 65 F (18 C) for 2 to 3 days near the end of primary fermentation to clean up any off-flavors.
- Cold-crash and lager (cold-condition) at 32 to 35 F (0-2 C) for at least 2 to 4 weeks. This slow cold-conditioning step is what gives lagers their name and their clean, crisp character.
- Bottle or keg once fermentation is complete and the beer has cleared. Expect a final ABV around 5.1 to 5.4 percent.
Notes
Fermentation Temperature and Lagering Tips
If you don’t have a dedicated temperature-controlled fermentation chamber, a large tub of water with frozen water bottles rotated every few hours can get you into the low 50s reliably enough for homebrew purposes, though a proper chest freezer with a temperature controller is worth the investment if you plan to brew lagers regularly. Skipping the diacetyl rest is the most common mistake: without that 2 to 3 day warm-up near the end of fermentation, you risk a persistent buttery or butterscotch flavor that cold conditioning alone won’t fully clean up.
If this is your first time working with lager yeast, our ABV Equation guide is useful for tracking your actual gravity readings against the recipe’s targets, and our Lager Beer Brands guide is a good side-by-side reference if you want to dial in your recipe to taste closer to a specific commercial beer.
Want to see how this recipe stacks up against real commercial examples before you brew it? Our Best Lager Beers guide and American-Style Lager guide both cover the flavor profile this recipe is built to hit. If you want to go a step further into lager history and try a more traditional decoction mash, our Czech Lager guide covers the original 1842 Pilsner Urquell process this style descends from.
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FAQs
Can I brew a lager without a dedicated fermentation fridge?
Yes, though it takes more effort. A large water bath with frequently rotated frozen water bottles or ice packs can hold fermentation temperatures in the low 50s Fahrenheit well enough for most homebrew lager recipes, but a temperature-controlled chest freezer gives far more consistent results if you plan to brew lagers regularly.
How long does it take to brew a lager compared to an ale?
A typical ale can be ready to drink in 3 to 4 weeks. A lager usually takes 6 to 8 weeks total once you include primary fermentation, a diacetyl rest, and 2 to 4 weeks of cold lagering.
What is a diacetyl rest and why does it matter?
A diacetyl rest is a short period near the end of primary fermentation where you raise the temperature to around 65 degrees Fahrenheit for 2 to 3 days. It lets the yeast reabsorb diacetyl, a byproduct that tastes buttery or like butterscotch if left in the beer, which is more of a risk with the colder, slower fermentation lager yeast requires.
