Social media is buzzing with unique and sometimes perplexing food experiments, and the latest viral sensation is food blogger Calvin Lee’s unconventional creation: onion coffee. This surprising mix has generated a wide range of reactions online, from curiosity to outright repulsion.

In his video, Lee describes his experience with this odd pairing: “The spicy onion flavor makes the coffee taste extra bitter. I don’t like it.”

Biraja Rout, founder of Biggies Burger and Big Cafe, weighs in on this peculiar blend. He explains that while onions are packed with antioxidants and flavonoids that may boost immunity and fight inflammation, their sulfur compounds can clash with coffee’s acidity. This might cause stomach discomfort or bloating for some people. “It’s all about individual tolerance—listen to your body!” he advises.

How do onions affect the flavor and overall taste of coffee? Adding onions to coffee can drastically alter its flavor profile. “Onions bring a sharp punch that can intensify the coffee’s natural bitterness, resulting in a brew that many may find unpleasant,” Rout says. Lee also comments that raw onions overshadow the subtle notes of coffee, making the experience less enjoyable. “Caramelized onions might add a hint of sweetness to balance out the bitterness, but overall, it’s an acquired taste,” he notes.

Historical or cultural precedents for this combination Rout points out that there is no historical or cultural tradition of pairing onions with coffee. This seems to be a modern experiment rather than a time-honored practice. “Traditional coffee pairings, like Turkish coffee with cardamom or Vietnamese coffee with condensed milk, are designed to enhance the coffee’s flavors, not overpower them,” he adds. While innovative culinary ideas are exciting, onion coffee may be more of a fleeting trend than a lasting one.

Other unusual coffee combinations that have gone viral Coffee has seen various unconventional pairings over the years, according to Rout:

• Butter Coffee: Popular among keto dieters, this creamy drink is made with butter and coconut oil.
• Salted Coffee: Adding a pinch of salt can reduce coffee’s bitterness and enhance its natural sweetness.
• Spiced Coffee: Spices like cinnamon, nutmeg, and cardamom add a warm, aromatic touch to your coffee.