Add the hot coffee, butter, MCT oil or coconut oil and sweetener (if using) to a blender.
Blend on high for 15 to 20 seconds until creamy and frothy. Keep the lid vented and covered with a towel.
Pour into a mug and enjoy right away.
Notes
New to MCT oil? Start with 1 tsp butter and 1 tsp MCT oil and build up slowly to avoid an upset stomach.
No MCT oil? Use coconut oil, extra butter, ghee or 1 to 2 tbsp heavy cream.
Sweetener: Add a teaspoon of sugar-free syrup or one packet of stevia or monk fruit blend.
Blending safety: Hot liquids expand in a blender. Vent the lid and blend in short bursts.
Add-ins: Collagen peptides, half a scoop of protein powder or a pinch of cinnamon all blend in well.
Storage Butter coffee is best fresh. If you have leftovers, refrigerate in a covered jar for up to 1 day. Reheat in the microwave in short bursts, then re-froth or stir well, since the fat separates as it cools.