Overview
- Originators Libby Cope and Jacob Arnold carried heavy cream in double zip-top bags during Oregon trail runs, producing butter after about six miles and drawing roughly 2 million TikTok views and 11 million on Instagram.
- Copycats from the United States to Korea and Australia are posting their own attempts, with TikTok reporting U.S. #running posts up more than 15% in the past two weeks and some groups even trying it at local races.
- Participants say trail impact helps more than pavement, the five- to six-mile range is a sweet spot, and cream around 60–65°F sets better than very cold or hot.
- Runners are sharing variations including honey or garlic butter, and some are deliberately shifting to ice cream by adding sugar and packing the bag in ice when temperatures are too cold for butter.
- Coverage notes the basic dairy science of fat coalescing under agitation, reports that creators sanitized hands before handling the butter, and points out the method is more for fun than savings compared with store-bought butter.