why does cheese smell strong?
The Short AnswerCheese develops strong smells through microbial fermentation during aging. Bacteria and molds break down proteins and fats into volatile compounds like ammonia and sulfur. These evaporate, creating aromas from mild to pungent based on microbial activity.
The Deep Dive
Cheese production starts with milk coagulation, forming curds and whey. After pressing and salting, aging begins, inviting microbes like bacteria and molds. These organisms secrete enzymes that break down proteins (proteolysis) and fats (lipolysis). Proteins yield peptides and amino acids; leucine becomes isovaleric acid (sweaty), methionine turns to methanethiol (cabbage-like). Fats release fatty acids; butyric acid smells vomit-like, capric acid is cheesy. Biogenic amines like putrescine add fecal notes. In washed-rind cheeses, brine washing promotes Brevibacterium linens, intensifying odors. Blue cheeses use Penicillium roqueforti, producing sharp ketones. These volatile compounds evaporate easily, binding to olfactory receptors with high sensitivity. Cheesemakers control temperature, humidity, and salt to balance flavor and prevent spoilage, showcasing microbiology's role in gastronomy.
Why It Matters
This knowledge helps cheesemakers craft consistent, safe products and innovate new varieties. It supports artisanal economies and preserves cultural heritage through protected cheeses. For consumers, it enhances appreciation and informed choices. In food science, it advances fermentation technology and waste reduction by distinguishing desirable aromas from spoilage. Ultimately, it connects us to sustainable dairy practices and centuries-old culinary traditions.
Common Misconceptions
One myth is that strong-smelling cheese is spoiled or unsafe. Actually, pungency often results from controlled microbial fermentation; spoilage shows sliminess, off-flavors, or unintended mold. Another misconception is that all strong cheeses smell alike due to similar bacteria. In truth, each variety hosts unique microbes: Limburger's odor comes from Brevibacterium linens, while Roquefort's tang is from Penicillium roqueforti, producing distinct volatile profiles.
Fun Facts
- The bacteria Brevibacterium linens, responsible for Limburger cheese's pungent smell, is also found on human feet and contributes to foot odor.
- Époisses de Bourgogne, a French cheese, is so odorous that it is prohibited on public transport in France.