Malt and Grain: Building the Foundation of Your Beer

Malt is the structural foundation

In most beers, malt provides the majority of:

• fermentable sugar;
• color;
• proteins;
• body;
• foam-supporting compounds;
• bread, biscuit, caramel and roast flavors.

A good grain bill is usually easier to understand than a bad one. Every ingredient should have a reason to be there.

What malting does

Barley contains starch but raw barley is not immediately ideal for brewing.

During malting, grain is allowed to germinate under controlled conditions and is then dried or kilned. This develops enzymes and changes the grain so that its starches can be accessed during mashing.

Kilning and roasting then create a wide range of colors and flavors.

Base malt

Base malt normally makes up the largest part of an all-grain recipe.

Common families include:

• Pilsner malt;
• pale ale malt;
• pale two-row;
• Vienna malt;
• Munich malt.

These malts differ in color, flavor intensity, protein and enzymatic power.

A recipe can often become more coherent by choosing the right base malt rather than adding many specialty malts to force a flavor that the base could provide naturally.

Crystal and caramel malts

Crystal/caramel malts contribute varying degrees of:

• caramel;
• toffee;
• dried fruit;
• sweetness perception;
• color.

Their exact behavior depends on maltster and color level.

It is easy to overuse them. In hop-forward or highly attenuated beers, small quantities can add balance; excessive quantities may create heavy sweetness or muddled flavor.

Do not rely on generic names alone. A “Crystal 60” from one maltster is not guaranteed to taste identical to another product of similar color.

Toasted and kilned specialty malts

Malts such as biscuit, aromatic and darker Munich-type malts can provide:

• toast;
• crust;
• nuts;
• rich bread;
• melanoidin-like depth.

These are useful when you want malt complexity without roast character.

Again, use them for a defined sensory goal.

Roasted malts and grains

Chocolate malt, black malt and roasted barley can create:

• cocoa;
• coffee;
• roast;
• burnt toast;
• dark color;
• dryness or bitterness.

Small changes can be obvious in the finished beer.

Roasted materials are also more acidic than pale base malt and can influence mash pH.

Wheat, oats, rye and other grains

Wheat

Wheat contributes protein, foam and characteristic grain flavor. It has no husk, which matters in lautering when used at high percentages.

Oats

Oats can contribute smoothness, body and haze stability in appropriate styles.

Rye

Rye can add a distinctive spicy grain character and viscosity.

Maize and rice

These can lighten body and flavor when used appropriately. They are not inherently low quality; their value depends on the beer you intend to make.

Simple sugars

Sucrose, dextrose and brewing sugars are fully or highly fermentable compared with many malt-derived dextrins.

In the right recipe, simple sugar can:

• raise OG and ABV;
• reduce final body relative to adding the same extract from malt;
• help create a dry finish.

This is common in strong Belgian-inspired beers and other styles where high alcohol with excessive body would be undesirable.

Enzymatic power matters

Not every malt can convert large quantities of starch.

Base malts usually provide sufficient enzymes for normal mashes. Some heavily kilned or roasted products contribute little or no useful enzymatic power.

When designing a recipe containing large amounts of unmalted or low-enzyme grain, verify that the overall grist has enough enzymatic capacity or use an appropriate process.

Color is not flavor

Beer color systems such as SRM or EBC describe color, not taste.

Two grain bills can reach similar color values with very different sensory outcomes.

For example, dark color can come from:

• a small amount of very dark roasted malt;
• a larger amount of medium-dark malt;
• specialty products designed mainly to add color.

The predicted color may be similar while roast intensity differs dramatically.

Keep the grain bill intentional

A useful design exercise is to assign a role to every grain:

• base fermentables
• malt flavor
• color
• body/foam
• roast
• special character
• fermentability adjustment

If two or three ingredients are doing exactly the same job, ask whether all are necessary.

Complexity should be sensory, not merely numerical.

Crush and extraction

Grain crush affects efficiency and lautering.

Too coarse:

• poor extraction;
• lower gravity.

Too fine:

• lautering problems in traditional systems;
• more flour;
• potential process difficulties.

BIAB systems can often tolerate a finer crush because they do not rely on the grain bed in the same way as traditional lautering systems.

Dial in crush for your equipment rather than copying someone else’s mill gap blindly.