2. Pre-heat blender: Boil extra water and pour it into a blender while your coffee brews to pre-heat the blender.
3. Froth: Empty hot water from the now pre-heated blender and add the brewed coffee, butter, and MCT oil. Blend until there is a thick layer of foam on top like a latte. A Blend-tec or Vitamix blender will do it quickly, a normal countertop blender takes longer, and a hand blender works okay if you don't have a real blender.
4. Add cinnamon, vanilla, dark chocolate, or a sweetener like Stevia, erythritol, or xylitol (optional)
5. Put on a satisfied look and enjoy the high performance buzz from your creamy mug of Bulletproof Coffee