Malting improvements have made today’s wheat beers more refined, but it is the authentic Bavarian wheat beer yeast that links us to those brews of yore. To say that they are vastly different than other top-fermenting yeasts would be an understatement. They breathe more character into a beer than any other single strains, and next to spontaneously fermented brews, produce aroma and flavor complexity without peer. The obvious difference between weizen yeast and even the most estery top-fermenting yeast sheds some light on what beer may have been like long ago, as much of that very character was selected out of the yeast moving forward. There is enough personality in a wheat beer from the yeast to make “session” strength versions of 4.0 percent or less ABV without losing anything, even better for a summer quencher.
Constructing Wheat Beers
While the three versions are different, there are a few guidelines and considerations that we need to bear in mind when composing them. Of course, you can make a hoppy version, one with less wheat or all wheat (possible with all-grain) or a “wheaty” ale, porter, stout or lager using the standard yeasts. This information should be helpful even in those cases.
All-Grain: Authentic Bavarian wheat beers must contain at least 50 percent malted wheat, with most between 50 percent and 70 percent. German wheat malt would be the most true to the style, but North American, British and Belgian maltsters also make suitable versions. A blend of malted wheat and pilsner or two-row will make a hefeweizen, blonde in color. The inclusion of 20 to 30 percent Vienna or dark wheat malt will deepen the color to a handsome burnished-gold. Munich malt adds a wonderful underlying malty character and a reddish tint, essential for dunkelweizen or weizenbock. Caramel or chocolate wheat malt can also be used in these brews, but it is best to restrict them to no more than 5 percent of the grist.
When using wheat at 40 percent or more in all-grain batches, it helps to use a lautering aid, such as rice hulls, to prevent stuck mash since wheat contains no husk. It would be wise to do a protein rest to help break down the excessive protein and skirt potential stuck mash issues. Conduct the saccharification rest in the mid-range, 150 to 153 degrees F to ensure some body. Weizenbier is naturally turbid, so don’t expect perfectly clear wort during vorlauf or great flocculation post-fermentation. You can even eliminate the secondary fermentation.
Extract: Extract brewers can choose between liquid and dried malt extract. The composition is made available by the vendors, and contain both wheat and barley malt. Some are 50:50, while others are 65:35 in favor of wheat, making it possible to compose a wheat-heavy extract beer. Use some pilsner or light DME if you want less wheat and more barley. The extra protein in wheat means that you can forgo bodybuilding specialty malts even in lighter wheat beer recipes. Wheat malt extract combined with amber or Munich malt extract (30 percent of fermentables) and caramel or chocolate wheat specialty malt (0.5 pounds per 5 gallon batch) makes excellent dunkel or bock wheat beers possible.
Liquid yeast options are somewhat limited, but the differences among them are significant. Read the individual specs carefully to see if it will deliver what you want, as the flavor profiles vary immensely from strain to strain. Some are quite mellow, while others are very aggressive. Any of them can be used for the three types of Bavarian wheat beer.
The low end of the recommended temperature range will give a vastly different outcome than those fermented at the higher end. Pay particular attention to the fermentation temperature range suggested by the yeast vendor, as excessive byproducts at too high a temperature might be a bit overwhelming.
Dried wheat yeast capable of bringing a touch of Bavaria to your homebrewery can also be purchased. The ripe aromas and flavors of banana, clove, vanilla, apple, citrus and bubblegum from the yeast make Bavarian wheat beers so appealing and unique. It is the most important decision you’ll make when crafting one.
Hop rates should be low, in the range of 15 to 20 IBU, for all styles, with minimal to no hop aroma. German noble hops and American versions of those work best.
Kegged weissbier and dunkelweizen can be consumed quite young for that fresh, hazy, yeast-driven profile. Weizenbock benefits from a little age, adding a mellow lager-like quality and enhancing the malt notes a bit more. When bottling wheat beers, use a tad more priming sugar than normal as the spritzy nature will not only make it more refreshing, but also will enhance the moussy, billowing head created by the protein-rich wheat.
