The Strange Tendency to “churn Butter on the Run” Actually Runs Quite Deep.
Running offers many benefits: stress relief, personal bests, chafing—the list goes on. What’s more, you can add “oil” to that list right now.
Running content creator Libby Cope went viral not because of her pace or the miles she logged, but because she makes money along the way. Her video of herself churning butter while riding a train has racked up over a million likes on Instagram and TikTok . Let’s explore how this works in practice and why it’s my favorite type of runner content right now.
How to churn butter while running
In her viral videos, Cope pours heavy cream and salt into double-zip-lock bags, stuffs the soft milk packets into her running shirt with her boyfriend, and goes for a run. By the time they’re done, the butter is ready too. They spread it on sandwich bread and eat it right there. So how crazy is this?
As the Dairy Research Center explains, this makes perfect sense. Milk is an emulsion, a mixture of fat and water molecules that naturally don’t tend to coexist. If left alone for long enough, milk will begin to separate, and the fattier molecules will float to the surface. This layer of fat, skimmed off the surface, is cream. And cream, it turns out, is just one step away from turning into butter.
When cream is churned—for example, during intense treadmill workouts—the fat molecules within it begin to collide with each other. Eventually, they begin to clump together, forming increasingly larger clumps and forcing the remaining liquid (buttermilk) out. The butter should remain in the center of this churned mass.
The key variables are time and intensity of action. A simple walk probably won’t do, as the movement needs to be long and vigorous enough to constantly smash fat molecules together. A trail run, with its constant ups and downs, the shaking of vest pockets, and more than 30 minutes of continuous movement, will likely do the trick. Essentially, your body is doing the work that would otherwise be done by a wooden churn or mixer.
Of course, many other factors must be taken into account. Low temperatures can slow down the process, while too high a temperature can melt the entire product. The quality and quantity of ingredients, the intensity of production, and the weather outside all play a role in perfecting this continuous production process.
Cope’s videos aren’t the only examples of runners using training as a cooking tool. Last fall, running blogger TrailswithZach posted a video tutorial of himself making chocolate ice cream while running, which garnered over 137,000 likes. Here’s another example from runner Irene Choi , who took a more creative approach, creating a recipe for honey-cream butter with corn juice.
Why This Social Media Trend Matters (Beyond the Oil)
At a time when the online running community feels stifled by unrealistic expectations , this micro-movement is a breath of fresh air. It would be easy to dismiss it as a passing internet joke, but there’s a deeper meaning. Cope told Runner’s World that the experience was a reminder of why she runs in the first place and all the joy it brings her.
This is what sticks in your mind like butter on bread. Online running culture can be intimidating and discouraging, with the pressure to buy the right shoes, achieve top times, sign up for all the hottest races, and so on. Churn butter while running is a joyful reminder that running can also be playful and quirky. Even if you don’t plan on getting covered in buttercream yourself (which I absolutely do not plan on doing), these videos are a great way to reflect on why you run in the first place.