How to Read a Beer Recipe

A recipe is a process specification

A beer recipe is more than a list of ingredients. It describes a target beer and the process used to reach it.

Before brewing, you should be able to answer:

• How much finished beer is the recipe designed to produce?
• What Original Gravity and Final Gravity are expected?
• What is the target bitterness?
• Which ingredients are used and why?
• When are hops added?
• What mash schedule is required?
• Which yeast strain is intended?
• What fermentation temperature is planned?
• How will the beer be carbonated?

If any of these are unclear, resolve them before heating water.

Batch size

“Batch size” can mean different things in different recipes:

• volume into the fermenter;
• post-boil volume;
• packaged volume.

A 20 L recipe designed for 20 L into the fermenter is not identical to one designed for 20 L packaged beer. Losses to kettle trub, hops, fermenter sediment and transfers can be significant.

When importing a recipe, verify what the original author meant.

Gravity

Original Gravity — OG

OG is the gravity before fermentation.

Example:

OG 1.052

A higher OG generally indicates more dissolved extract and, if fermented, greater potential alcohol.

Final Gravity — FG

FG is the expected gravity when fermentation has finished.

Example:

FG 1.012

FG is influenced by:

• wort fermentability;
• yeast attenuation;
• fermentation health;
• mash profile;
• adjuncts;
• measurement method.

Expected FG is a target, not a command. Real yeast and real wort can behave differently.

ABV

Alcohol by volume is usually estimated from the difference between OG and FG.

A common approximation is:

ABV ≈ (OG - FG) × 131.25

For an OG of 1.052 and FG of 1.012:

(1.052 - 1.012) × 131.25 ≈ 5.25% ABV

Software performs this calculation automatically, but understanding the relationship helps diagnose unexpected results.

Grain bill

The grain bill may be expressed in kilograms, pounds or percentages.

Learn to identify each ingredient’s role.

A typical recipe may contain:

• a large percentage of base malt;
• smaller quantities of specialty malt;
• grains for body or head retention;
• roasted grain;
• sugar or other adjuncts.

Do not judge an ingredient only by its percentage. A small amount of dark roasted malt can have a stronger sensory effect than a much larger amount of a mild base malt.

Mash schedule

A simple recipe might say:

Mash at 66°C for 60 min

A more complex recipe may use multiple rests.

The mash schedule tells you:

• rest temperature;
• duration;
• possible mash-out temperature;
• sometimes water-to-grain ratio.

Confirm whether the recipe assumes infusion heating, direct heat, decoction or another method.

Your equipment may require a slightly different strike-water temperature to reach the same mash rest.

Hop additions

Hop timing is commonly written as time remaining in the boil.

Example:

• 20 g Magnum — 60 min
• 30 g Cascade — 10 min
• 50 g Cascade — whirlpool
• 80 g Citra — dry hop

The 60-minute addition is added near the start of a 60-minute boil.

A 10-minute addition is added with 10 minutes remaining.

“0 min” or “flameout” usually means an addition when heat is turned off, but the actual flavor and bitterness contribution still depends on how hot the wort remains and for how long.

Whirlpool additions should ideally specify:

• temperature;
• duration.

Dry hops should ideally specify:

• amount;
• timing;
• contact time;
• sometimes temperature.

IBU

IBU is a calculated or measured representation of bittering compounds in beer.

Two recipes with the same IBU can taste very different because bitterness perception depends on:

• gravity;
• residual sweetness;
• sulfate/chloride balance;
• hop variety;
• late-hop load;
• fermentation;
• alcohol;
• carbonation.

Treat IBU as an important parameter, not a complete description of bitterness.

Yeast

A recipe should specify the strain or at least a functional equivalent.

Do not substitute yeast solely because both products are labeled “ale yeast.”

Check:

• attenuation;
• fermentation temperature;
• flocculation;
• flavor profile;
• alcohol tolerance;
• pitching guidance.

If substituting, choose a strain that supports the beer’s intended character.

Fermentation schedule

A good recipe should indicate more than “ferment for 7 days.”

Time alone does not prove completion.

Useful information includes:

• pitch temperature;
• fermentation temperature range;
• planned temperature rise;
• conditioning phase;
• dry-hop timing;
• cold crash if used.

Always verify final gravity before packaging.

Packaging and carbonation

Recipes may specify carbonation as:

• volumes of CO₂;
• grams/litre;
• pressure/temperature for kegging;
• a priming-sugar quantity.

If a recipe gives a fixed priming-sugar quantity, do not blindly copy it when your packaged volume or beer temperature differs.

Calculate priming for your actual beer.

Scale recipes carefully

Scaling a recipe is not always linear.

Grain and hop weights can often be scaled approximately with volume, but:

• brewhouse efficiency can change;
• boil-off changes with equipment geometry;
• hop utilization can change;
• losses do not always scale proportionally.

When moving a recipe to a different system, rebuild it around your equipment profile rather than simply multiplying every number.