The company behind the butter and coffee craze plans to open a cafe in NYC - Here's what it's like

Coffee with butter isn't a typical morning beverage. But it's become a craze among biohackers and those looking to add extra energy to their day.

Championed by Dave Asprey, author of "The Bulletproof Diet," the aptly named "Bulletproof coffee" (BPC) is a mix of specially treated coffee, butter from grass-fed cows, and "brain octane" oil, which is similar to coconut oil.

You've never seen these ingredients on a Starbucks menu. But they're staples at the Bulletproof café in Santa Monica, California - and more cafés could be springing up around the country soon.

On Wednesday, Asprey announced that his company, Bulletproof, had raised an additional $19 million from lead investors CAVU Venture Partners.

With the new money, the company said it plans to fuel its retail expansion, including opening up a store in New York City. Last year, I stopped by Bulletproof's café in Santa Monica to see if a coffee and butter concoction could keep me fueled for my drive back to San Francisco. Here's what it was like: