Adventures in Low Carb: Bullet-Resistant Coffee


So this is the latest goofy food fad: hot buttered toffee coffee. Basically, here's the idea: you add unsalted butter, plus a little coconut oil, to coffee and whip it up in a blender, and drink that for breakfast.  Nothing else.  The theory is that this provides a good start for the day, leading to faster fat metabolism, increased mental alertness, weight loss, cures yaws, gives you greater strength, and conceals any foolish political contributions you may have made when young and foolish.

Or something.  It's officially called Bulletproof Coffee, and according to the recipe you have to make it with special low-toxin coffee beans that the inventor sells for $26 a pound.

Well, maybe. Hot buttered drinks aren't that unusual; Tibetans drink tea with butter. But the recipe sounds like a pain in the ass -- coffee, boiling water, blender, and so on.  But let's apply a little thought here.  Butter, reasonably enough, is basically 100 percent butterfat, and about 100 kcals a tablespoon. What you're doing when you run it through a blender with liquid is returning the butterfat to an emulsion -- you're "re-creaming" it. Heavy cream, like whipping cream, is about half butterfat by volume (and 50 kcal per tablespoon).  So it stands to reason that adding heavy cream to coffee would be effectively the same.

So I tried it.  The recipe suggests between 2 and 6 Tsp of butter, so that's 4 to 12 Tsp of cream -- so make it 1/4 to 3/4 cup of cream.  For the last couple of days, I've started the day by adding about a quarter cup of cream to a big cup of coffee, adding some Stevia because I'm not thrilled by coffee with cream and no sugar -- I usually prefer black -- and drinking that first thing.

Okay, I've got to say, it's pretty satisfying; I don't have any particular hunger until noonish. And from the pure caloric standpoint, it's got no carbs at all, and only about 200 kcal. As to any other effects, well, it's only been two days.

When I lived in Europe, I used to go to Paris every so often, and stayed in a little hotel in the 15th arrondissement. Regular French businessman's hotel, nothing special.  As with most European hotels they served "breakfast"; as with most French hotels, that consisted of a half a baguette, cafe au lait, a big lump of butter, and some jam. (And last night's baguette at that, so it was a little hard.) You butter a chunk of the bread and dunk it, then eat it and drink the coffee. Now, I would have preferred eggs over easy and bacon, but honestly it was pretty good.

But it occurs to me that this isn't far away from what we're talking about: several hundred kcals of butterfat, coffee, and of course some carbs.  Maybe it's not such a crazy idea.