Wheat malt content is typically 50% of the grist (as with all German wheat beers) with the remainder being Pilsner malt. A symbiotic fermentation with top-fermenting yeast and Lactobacillus delbruckii provides the sharp sourness, which may be enhanced by blending of beers of different ages during fermentation and by extended cool aging. Hop bitterness is extremely low. A single decoction mash with mash hopping is traditional.