International dark lager is a family of related minor beer styles that share similar sensory characteristics and history. It was formally defined within the Beer Judge Certification Program (BJCP) Style Guidelines in the 2015 edition, when the International Lager category was added to describe the variety of mass-market industrial lagers produced around the world. In the prior 2008 edition of the guidelines, these types of beers were best described by the Dark American Lager style, but that version tended to exclude the more premium or international versions, or somehow imply that international products were derived from American examples.

The 2015 International Lager category was intended to capture the common everyday lagers made by major multi-national brewers, while also allowing for some of the slightly more premium examples. Before 2000, the Dark American Lager was often epitomized by the Michelob Classic Dark example, if for no other reason than it was widely available and was frequently cited by Dr. George Fix as having a predictable 17 SRM color reference.

At the time, the beer was best described as an American adjunct lager that often was colored dark with a commercial colorant that added little flavor. Large market European examples often followed a similar pattern, with a dark lager being a variant of their pale lager. However, other countries had dark lagers that involved different recipes. The Brewers Association style guidelines recognizes four subcategories in their International Dark Lager category (American, European, Czech, and Mexican). The BJCP groups the Czech lager differently, but the others are part of the single style.

I judged a first-round flight of these beers at the 2025 Great American Beer Festival, so I have some observations about how this style presents in competition and what some of the most common errors were. I think these comments will also be helpful for homebrewers trying to enter their beers in competition, or to at least troubleshoot basic issues. 

International Dark Lager is style 2C in the 2021 BJCP Style Guidelines, along with International Pale Lager and International Amber Lager. Together, these form the International Lager category and describe the basic color-driven range of many modern lager portfolios of large commercial breweries.

Sensory Profile

International dark lagers are first identified by their color; they don’t have to be strictly dark, but the range starts at a deep amber and goes up to a very dark brown, not black. Basically, something darker than an amber lager but not as dark as a stout. The head is usually beige to a light tan in color, but may not persist. Clarity is bright, as with most lagers, if not opaque in normal light.

The lager character is the next aspect of the beer to consider. A clean fermentation profile is typical, along with good attenuation. Clean doesn’t have to mean neutral, however; a good lager often can have background fermentation esters and a whiff of fresh sulfur indicating freshness. The lager character should give it a smooth palate without rough flavors, and allow the malt flavors to come through cleanly. The bitterness level likewise does not interfere with the malt impression; the perceived bitterness can be low to medium. The combination of attenuation, malt flavors, and bitterness level should result in a beer that doesn’t seem overly sweet.

The malt that gives the beer color also gives the beer flavor and aroma, and this character is probably the one aspect most open to brewer interpretation. There are a wide range of malts that can give dark colors, but it’s typical to find caramel and toasty flavors in these beers. Roasty flavors are usually restrained and should not be strong or have a burnt character. Flavors of chocolate, coffee, brown sugar, or molasses may be found as supporting flavors.

The hop flavor and aroma is fairly low and should be unobtrusive, if present at all. An aggressive hop character is out of place in this style. The hop bitterness is enough to make the beer not seem overly sweet, but the balance should remain malty. The finish should be soft but dry with a malty aftertaste.

This style is an average strength beer, around 5% ABV, but can range a little higher. In stronger versions, the other flavors can be stronger as well, but a noticeable alcohol character is out of place. The overall impression of the style is that of a smooth lager with a light but interesting chocolate and caramel flavor, restrained bitterness, and a clean finish. It’s an everyday drinking kind of beer that goes well as an accompaniment to most foods.

When I judged these beers at the GABF, I found some common errors that hurt several entries. Some had brewing or handling faults that would be problematic in almost any style. Fermentation issues that cause off-flavors, infections, sourness, acetaldehyde, diacetyl, and high fruitiness are all problems. Oxidation or staleness are common handling problems, as lagers like this taste best when fresh.

Beyond those issues, the remaining problems had to do with ingredient selection and balance. A common problem was beers that were too hoppy or bitter, or beers that had too much roasted or burnt flavor. On the other side, some beers were too sweet or heavy in the finish. The best examples had a soft finish with a malty aftertaste, and the correct malt flavors in a pleasant proportion. Finally, the beers had to present as fresh and smooth lagers, so not having rough flavors or showing an abbreviated lagering period. 

Brewing Ingredients and Methods

While the origins of the style hint at making a standard American lager and then coloring it with caramel, I think that homebrewers can design a standalone recipe that isn’t simply a variation created at packaging. This is what craft brewers do anyway, so I think the industrial brewing approaches are better left for the big boys. Craft brewers (and homebrewers) have some latitude in making choices and in interpreting the style, so let’s walk through these decisions.

As an international lager, the base malts shouldn’t have a strong flavor profile. I would steer away from using all German malts (such as Pilsner, Vienna, or Munich malts) that would make it taste too much like a Munich dunkel or schwarzbier. American two-row or six-row can be used, although my preference is for the less grainy two-row. If you do use European malts, consider diluting the flavor with American two-row or other equally neutral malts as part of the grist. I like blending base malts anyway, so that’s what I often do.

The style can be made as an all-malt beer, or it can use starchy adjuncts like corn and rice, or even dark brewing sugars. If I was using more strongly flavored German malts, I might use those adjuncts to cut the flavor. Similarly, I would also think about using them if using the higher-protein six-row malt. The form of corn and rice would drive how the mash schedule would work; using flaked grains would simplify the mashing and allow a single infusion mash schedule. 

The specialty malts will add the color and flavor to the beer. Most typically, this will include some kind of crystal or toasty malt along with something darker giving deeper flavors that usually include chocolate. Be careful about using too much dark malt or those with a higher degree of roast, or you’ll pick up a roasted or burnt flavor that is unwanted in this style. I prefer to use huskless dark malts for color adjustment to reduce the possibility of unintentional flavor pickup.

The beer is fairly well-attenuated, so the mash schedule should be targeted towards dryness. A step mash or a single-infusion mash with a conversion temperature at the lower end of the range (say, 149–151 °F or 65–66 °C) would work. Nothing complicated is required for this style. I would avoid higher mash temperatures as I don’t expect a big body or too much sweetness from this style.

Hopping is straightforward with a single bitterness charge keeping the balance somewhat malty. A light flavor or aroma hop addition is optional at the brewer’s discretion. I would stick to noble-type hops to blend well with the malt and to not be overly intrusive. American hops that mimic noble characteristics work well and are often fresher in homebrew shops. I would avoid citrusy, piney, dank, tropical, or other aggressive hop profiles as the style doesn’t feature those characteristics.

There is no distinctive water characteristic in the finished beer style, so something that is light on minerals is best. Again, no need to complicate things. If you need to add calcium for the mash chemistry, my preference is the more neutral-tasting calcium chloride that also favors a more rounded, malty finish.

Since this style is a lager, we obviously need to select a lager yeast. The style has a clean fermentation profile and a malty balance, so yeast strains that favor those finished characteristics are best. I like the clean to malty German lager strains, such as the clean W-34/70 strain that is available in many forms from several producers, or the malty-finishing German bock lager strain. American lager strains could certainly be used as well. Nothing special needs to be done with the fermentation; I like to use traditional German production techniques with fermentation temperatures around 50 °F (10 °C) followed by a lagering period near freezing.

Homebrew Example

My version is like a premium American dark lager that uses adjuncts. The base malt is a North American two-row malt with the addition of some European Pilsner malt to add a little more character. I’m using both corn and rice in flaked format for easier mashing. The adjuncts represent almost 20% of the grist. The dark color and flavors come from the addition of European caramel malt and a huskless dark malt that is similar to a chocolate malt. The color should come in firmly in the brown range.

I’ve selected a single-infusion mash for this beer at the lower end of the typical temperature range to encourage attenuation. There will be a bit of residual sweetness from the caramel malt, but the balance leans towards the malty side as the bitterness level is around 14 IBUs. A single bitterness addition of a hop with noble characteristics will be unobtrusive.

The fermentation schedule is fairly traditional, and my yeast choice is the maltier tasting German bock lager yeast. If this yeast isn’t available, the W-34/70 strain is a good substitute. I prefer to lager until the palate is smooth and the beer has dropped clear, and then will package it. 

This version will hit the upper end of the style in flavor, but is otherwise middle of the road in other respects. In my part of the U.S. Midwest, dark lagers are cool-weather beers, but I would still drink one in the summer after cutting the grass. However, my first preference is to drink them while watching football games, as it is fairly food-friendly.

International Dark Lager: By the Numbers

OG: 1.044–1.056
FG: 1.008–1.012
SRM: 14–30 
IBU: 8–20
ABV: 4.2–6%

Further Reading …

The 2015 Beer Judge Certification Program Style Guidelines added the International Lager category, made up of International Dark Lager, International Amber Lager, and International Pale Lager. The color isn’t the only difference in these styles, though they do have commonalities. Gordon has previously written about the amber version in a “Style Profile” column you can find here.