Why does butter coffee need to be blended?

Blending emulsifies the butter and MCT oil into the coffee, creating a uniform, creamy mixture similar to a latte. Without blending, the fats simply float on top in a greasy, unappetising layer. The high-speed blender breaks the fat into microscopic droplets that remain suspended in the coffee. Stirring with a spoon will not achieve this. A blender, immersion blender, or milk frother are the only methods that produce the correct texture.

Can I use regular butter instead of grass-fed?

You can, but the flavour and nutritional profile differ. Grass-fed butter has a richer, more complex flavour and a higher concentration of omega-3 fatty acids, conjugated linoleic acid, and fat-soluble vitamins. Conventional butter works in terms of texture but tastes flatter and less interesting in the cup. Always use unsalted butter regardless of the source, as salted butter creates an unpleasant savoury-sweet conflict in the drink.

Is butter coffee a meal replacement?

Many people use butter coffee as a breakfast substitute, particularly those following ketogenic or intermittent fasting protocols. A standard serving contains roughly 300-400 calories from the butter and MCT oil. However, it provides almost no protein, fibre, vitamins, or minerals, so it is not nutritionally equivalent to a balanced meal. It can sustain energy for several hours due to the slow-burning fat content, but relying on it daily as a sole breakfast is nutritionally incomplete.

How to Make Butter Coffee

Butter coffee blends hot, strong black coffee with grass-fed unsalted butter and MCT oil (medium-chain triglyceride oil derived from coconut oil) into a frothy, creamy drink. Popularised by biohacking culture, the drink draws on traditions from Tibet and Ethiopia where butter has been added to tea and coffee for centuries. The blending step is non-negotiable: it emulsifies the fats into the coffee, creating a latte-like texture rather than an oily slick.

What You Need

Coffee Brewer

French press, pour-over, drip, or any method producing strong, hot black coffee. The coffee must be freshly brewed and very hot to melt the butter and oil during blending. Use a slightly higher coffee-to-water ratio than normal for a more robust base.

Blender or Immersion Blender

A countertop blender or immersion (stick) blender is essential. The 20-30 seconds of high-speed blending emulsifies the fats. A milk frother can work for small batches but may not fully emulsify the MCT oil. Never use a blender with a completely sealed lid on hot liquid, as pressure builds and can blow the lid off.

Kitchen Scale

For measuring the butter and MCT oil precisely. Too much fat makes the drink overwhelmingly rich and causes digestive discomfort, particularly for first-time drinkers. Start with smaller amounts and work up gradually.

Large Insulated Mug

A 350-400ml insulated mug keeps butter coffee hot for longer. The emulsion can separate as the drink cools, so maintaining temperature extends the creamy texture. Pre-warm the mug with hot water before pouring.

Step-by-Step Method

Brew Strong Coffee

Brew 240-300ml of strong, hot black coffee using your preferred method. Use a slightly higher ratio of coffee to water than normal, approximately 20g of coffee per 240ml of water. The coffee must be bold enough to hold its flavour against the butter and oil. French press works particularly well because it retains the oils that complement the added fats.

Measure the Fats

Measure 1-2 tablespoons (15-30g) of unsalted grass-fed butter and 1 tablespoon (15ml) of MCT oil. If you are new to butter coffee, start with 1 tablespoon of butter and half a tablespoon of MCT oil. MCT oil can cause digestive discomfort in larger doses until your body adapts. Build up gradually over a week.

Blend on High

Pour the hot coffee into a blender, add the butter and MCT oil, and blend on high for 20-30 seconds. The mixture should turn a creamy, opaque tan colour with a frothy head similar to a latte. If using an immersion blender, blend in a tall, wide container to avoid splashing. The emulsification is complete when no oil droplets are visible on the surface.

Check the Emulsion

Pour into your pre-warmed mug and inspect. A properly emulsified butter coffee looks like a creamy latte with a thin foam layer on top. If you see oil slicks or fat separating on the surface, blend for another 10-15 seconds. The drink should taste smooth, rich, and creamy with a clean finish and no greasy mouthfeel.

Serve Immediately

Drink butter coffee while hot. As it cools, the emulsion gradually breaks and the fats begin to separate, which affects both texture and taste. Do not add sugar or sweetener, as the butter provides a natural richness. If the flavour is too intense, increase the coffee volume or reduce the fat amounts in your next batch.

Troubleshooting

Oil Slick on the Surface

A visible layer of oil floats on top of the coffee rather than integrating into the drink.

Fix: The coffee was not blended long enough or at high enough speed. Return it to the blender and blend for another 20-30 seconds on the highest setting. An immersion blender may need 45-60 seconds to fully emulsify. If you stirred rather than blended, that is the problem. Stirring cannot emulsify fats into coffee. You must use mechanical blending.

Stomach Discomfort

Drinking butter coffee causes nausea, cramping, or urgent trips to the bathroom.

Fix: You are using too much MCT oil too quickly. MCT oil is processed differently by the body and can cause digestive distress at higher doses until you adapt. Start with half a teaspoon and increase by half a teaspoon every few days. Ensure you are using pure MCT oil (C8 and C10 medium-chain triglycerides), not unrefined coconut oil.

Bland, Flat Flavour

The butter coffee tastes like greasy water with no real coffee character.

Fix: Brew a stronger coffee base. Use 25g of coffee per 240ml of water. Choose a medium or dark roast with bold, chocolatey flavour notes that stand up to the fats. Light roast single-origin coffees with delicate fruity notes get completely overwhelmed by butter. Also ensure the butter is high-quality grass-fed, which contributes its own rich flavour.

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