Brew the coffee using your your preferred method (I recommend French press).
Place the ground coffee into the French press.
Bring the water to a boil and let it cool for a minute.
Pour the water into the French press and stir vigorously.
Depending on the preferred strength, steep for 2-4 minutes.
Then, press the plunger all the way down.
Complete Guide to Bulletproof Coffee
Pour your freshly brewed coffee in a blender or a heat-proof jar (if using immersion blender).
Add butter, Octane Oil, and any suggested optional ingredients.
Pulse until smooth and frothy.
If you're not using all the coffee at once, do not leave it in the French press.
Instead, pour it into a jar or a thermal carafe or thermal mug to keep it warm.
Complete Guide to Bulletproof Coffee
Serve!