TheKitchn.com

One of the hardest things about going on the keto diet might be quitting your morning latte habit. If you're used to starting your day by hitting the closest coffee shop, you'll have to hit the brakes; carbs add up quickly, even in the smallest-sized foamy milk drink.

But there's good news. You can make an equally creamy cup at home with just three ingredients: coffee, butter and MCT oil. It's every bit as frothy -- but more satiating -- than your usual order. It's called keto coffee. Of course, putting butter into coffee (or tea) is nothing new. Butter tea, for example, has been around for generations. But the butter-plus-coffee equation is (ahem) buzzy as of late, thanks to a big push from some health and nutrition proponents.

Here's what you should know about butter tea, Bulletproof coffee and keto coffee:

Butter tea

Butter tea is a traditional Tibetan drink made from tea and yak butter. It's the inspiration for keto and bulletproof coffee. In Tibet, buttered tea is served to guests, and milk teas are for everyday consumption.

Bulletproof coffee

Bulletproof coffee is a branded coffee beverage created by David Asprey, who was inspired by an energizing cup of yak butter tea while on a Tibetan trek. Asprey took that inspiration and turned it into Bulletproof, a company that markets a very specific process for making coffee. Bulletproof coffee is brewed in a French press (to retain the beans' oils), and made from filtered water, Bulletproof coffee beans, specialized MCT oil, and grass-fed butter or ghee.

Keto coffee

Keto coffee is an energy-dense, creamy caffeinated beverage that's similar to Bulletproof coffee. It's made by blending any hot, black coffee (you can use a drip coffee maker if you don't have a French press!) with MCT oil and grass-fed butter or ghee.

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