Keto Coffee: What It Is, Benefits, and How to Make It

Keto coffee is black coffee blended with fats such as MCT oil, butter, or ghee instead of milk and sugar. It is nearly carb free, so it fits a ketogenic diet, and it may support fullness and a mild rise in ketones, but it is also calorie dense.

Keto coffee, often called butter coffee or "fat coffee", became popular alongside low carb and ketogenic eating. Fans drink it in place of breakfast and say it keeps them full and focused until lunch. Critics point out that a single mug can carry as many calories as a meal with very little protein, fibre, or micronutrients.

Both sides have a point. This guide explains what keto coffee actually is, how it compares with other morning cups, what the research does and does not support, how to make it at home, and who should be careful with it.

What is keto coffee?

Keto coffee is any coffee drink built to keep carbohydrates close to zero while adding fat. The classic version has three parts:

1. Brewed coffee. Black coffee has almost no carbohydrates or calories on its own.
2. A medium chain triglyceride (MCT) source. Usually MCT oil, sometimes coconut oil, which naturally contains some MCTs.
3. A second fat. Unsalted butter or ghee is traditional. Some people use heavy cream or a dairy free creamer instead.

The ingredients are blended until frothy, which gives the drink a latte style texture without milk sugar. Variations add collagen protein, cinnamon, cocoa, or vanilla for flavour.

On a ketogenic diet, the goal is to keep carbs low enough that the body leans on fat and ketones for fuel. Keto coffee fits that pattern because almost all of its calories come from fat.

How does keto coffee compare with other morning coffee?

	Black coffee	Keto coffee (MCT + butter)	Latte with whole milk	Sweetened coffee shop drink
Main calories from	Almost none	Fat	Milk fat, milk sugar, protein	Sugar, milk, syrup
Approximate carbs	Near zero	Near zero	Moderate (lactose)	High
Calories per mug	Very low	High, often similar to a small meal	Moderate	Moderate to high
Protein	None	Very little unless collagen is added	Some	Some
Fits a ketogenic diet	Yes	Yes	Usually not in large amounts	No
Main thing to watch	Nothing added	Total calories and saturated fat	Portion size	Added sugar

The table shows the trade off clearly. Keto coffee wins on carbs, but it is not a "free" drink. If you add it on top of a normal breakfast, you are simply adding calories. If it replaces breakfast, the calorie maths can work out, but the nutrition is narrower than a meal with protein and fibre.

Why do people drink keto coffee?

People usually give one of four reasons:

- Fullness. Fat slows digestion, and many people say a creamy fat based coffee keeps hunger quiet for longer. - Steady energy. Without sugar, there is no sugar spike and dip from the drink itself. Caffeine still does the heavy lifting for alertness. - Staying in ketosis. For people following a strict ketogenic diet, it is an easy way to get fat in without carbs. - Convenience. It replaces a cooked breakfast with something that takes two minutes.

None of these are magic properties of the blend. They come from the basic facts that it contains caffeine, fat, and almost no sugar.

What is MCT oil and why is it in keto coffee?

Most fats in food are long chain triglycerides. MCTs are shorter, which changes how the body handles them. They are absorbed more directly and travel to the liver quickly, where a portion can be turned into ketones.

The main MCTs you will see on labels are:

- C8 (caprylic acid): the type most associated with faster ketone production. - C10 (capric acid): slightly slower, often blended with C8. - C12 (lauric acid): technically medium chain, but it behaves more like a long chain fat in the body. Coconut oil is rich in it.

This is why MCT oil, not coconut oil, is the usual choice for keto coffee. Coconut oil contains MCTs, but mostly C12, so its effect on ketones is smaller.

For a deeper look at MCTs on their own, see our guide to MCT oil for sustained energy and our article on MCT oil and satiety.

What the evidence does and does not show

Research on "keto coffee" as a single drink is limited. Most studies look at MCT oil, ketogenic diets, or caffeine separately. Here is a fair summary.

What the evidence suggests

- MCT oil can raise blood ketones modestly. Several small studies show that MCT oil, especially C8, raises ketone levels for a few hours after a dose, even when someone is not on a strict ketogenic diet. The rise is real but modest compared with fasting or a full ketogenic diet. - MCTs may support short term fullness. Some trials report that people eat a little less at a later meal after consuming MCT oil compared with other fats. Results vary between studies. - Caffeine supports alertness. This is well established and is likely the biggest reason people feel sharp after keto coffee. - Ketogenic diets can help some people manage weight in the short term. Reviews suggest ketogenic diets may support weight management over months for some people, largely because many find them filling. Long term results tend to look similar to other diets that reduce calories.

What the evidence does not show

- There is no good evidence that keto coffee itself burns fat. Adding fat to coffee adds energy. Fat loss still depends on overall intake and activity. - Higher ketones are not the same as fat loss. MCT oil can raise ketones from the oil you just drank, which is not the same as burning stored body fat. - Claims about dramatic brain benefits are not established in healthy people. Most cognitive research on ketones involves specific medical conditions. - Long term safety of daily butter coffee is not well studied. Butter and ghee are high in saturated fat, and some people see their LDL cholesterol rise on high saturated fat diets.

The honest summary: keto coffee may help some people feel full and stay within a low carb plan. It is a tool for structuring meals, not a fat burning drink.

Is keto coffee good for weight loss?

It can fit a weight management plan, but only under one condition: it has to replace something, not add to it. A mug made with a tablespoon of MCT oil and a tablespoon of butter can easily carry a couple of hundred calories. Drunk alongside eggs and toast, that is extra energy.

If keto coffee helps you skip a sugary breakfast and you stay full until a balanced lunch, it may support your goals. If it leaves you hungry by mid morning and you snack, it probably will not. Pay attention to how you actually feel and eat over the day.

If you are exploring ingredients that people commonly add to coffee for weight management, our guide to weight loss coffee ingredients goes through each one and the evidence behind it.

Does keto coffee break a fast?

Strictly, yes. Any drink with calories ends a true fast, and keto coffee has plenty. Some people following time restricted eating still drink it because fat has very little effect on insulin compared with carbohydrates, so they treat it as "fat fasting".

Whether that matters depends on your goal. If you fast for metabolic or calorie reasons, a fat heavy coffee changes the picture. If you fast mainly to avoid snacking, some people find it helps them reach their first meal. Black coffee is the only option that keeps a fast fully intact. For more on pairing coffee with fasting windows, see weight loss coffee and intermittent fasting.

How do you make keto coffee at home?

Here is a simple starting recipe.

You need:

- 1 mug (about 240 ml) of hot brewed or instant coffee - 1 teaspoon of MCT oil to start, building up gradually - 1 teaspoon to 1 tablespoon of unsalted butter or ghee (optional) - Optional: a pinch of cinnamon, a scoop of collagen, or a few drops of vanilla

Method:

1. Brew your coffee and add it to a blender or a tall jug.
2. Add the MCT oil and butter or ghee.
3. Blend for 15 to 20 seconds with a blender or milk frother until it is creamy and frothy. Stirring alone leaves an oily layer on top.
4. Add cinnamon or vanilla to taste and drink while hot.

Tips:

- Start small with MCT oil. Large amounts can cause stomach cramps or loose stools. Begin with a teaspoon and increase slowly over a week or two if you tolerate it. - Never put MCT oil in a hot plastic cup or polystyrene. Use ceramic, glass, or steel. - Add protein if it replaces breakfast. Collagen or a side of eggs makes the meal more complete. Our collagen coffee guide covers what collagen does and does not do. - Skip the butter if you watch cholesterol. MCT oil alone, or MCT with a splash of cream, keeps it lighter.

Can instant or functional coffee be used for keto coffee?

Yes. Any coffee with no added sugar works as a base. Instant coffee is convenient because it dissolves quickly and you can blend it straight in a mug with a frother.

Some functional coffee blends already include MCT. Our Superfood Coffee lists MCT alongside collagen protein, functional mushrooms such as lion's mane and cordyceps, turmeric, cinnamon and L-theanine, and its product page describes it as keto friendly. It dissolves in water, so you can use it as a base and add extra fat if you want a richer keto style drink. As with any product, check the label for the nutrition details that matter to your plan.

Our Weight Loss Coffee is a dark roast with plant extracts such as green coffee bean, green tea and garcinia cambogia. It contains no mushrooms and no MCT, but it can also serve as the base for a homemade keto coffee if you add your own fats.

If you want to browse coffees built around MCT, see our MCT coffee collection.

Who should be careful with keto coffee?

Keto coffee is not a good fit for everyone. Talk to a doctor before making it a habit if you:

- Have high LDL cholesterol, heart disease, or a family history of it (butter and ghee are high in saturated fat). - Have liver disease, gallbladder problems, or pancreatitis, since large doses of fat can be hard to process. - Have diabetes, especially if you take insulin or medicines that lower blood sugar, as diet changes can affect your doses. - Are pregnant or breastfeeding. - Are sensitive to caffeine, have anxiety, or have trouble sleeping. - Have a history of disordered eating, where skipping meals can be unhelpful.

This article is for general information only and is not medical advice. Speak to a qualified healthcare professional before changing your diet or taking new supplements, especially if you have a medical condition or take medication.

Frequently asked questions

What is keto coffee made of?

Keto coffee is usually brewed coffee blended with MCT oil and unsalted butter or ghee. Some versions use heavy cream, coconut oil, or collagen protein instead. The aim is a creamy drink with almost no carbohydrates.

Is keto coffee the same as butter coffee?

Mostly, yes. Butter coffee is one popular style of keto coffee: coffee blended with MCT oil and butter or ghee. Keto coffee is the broader term and also covers versions made with cream, coconut oil, or MCT oil alone.

Does keto coffee help you lose weight?

Keto coffee may support weight management if it replaces a higher calorie, sugary breakfast and keeps you full. It does not burn fat on its own, and adding it on top of your normal meals adds calories.

Does keto coffee break a fast?

Yes, technically. It contains calories from fat, so it ends a strict fast. Some people use it during time restricted eating because fat has little effect on insulin, but only black coffee keeps a fast fully intact.

How much MCT oil should I put in coffee?

Start with about one teaspoon and increase slowly over one to two weeks if your stomach tolerates it. Too much MCT oil at once commonly causes cramps or loose stools.

Can I make keto coffee without butter?

Yes. MCT oil alone, MCT oil with a splash of heavy cream, or a dairy free unsweetened creamer all work. Skipping butter lowers saturated fat, which may suit people watching cholesterol.

Can I use instant coffee for keto coffee?

Yes. Any unsweetened instant coffee works and blends easily with a milk frother. Check the label of flavoured or functional instant coffees for added sugar and carbohydrates.

The bottom line

Keto coffee is a simple idea: coffee with fat instead of sugar and milk. It fits a low carb diet, may support fullness, and MCT oil can nudge ketones up for a few hours. It is also high in calories and does not burn fat by itself. Use it as a breakfast replacement rather than an extra, start slowly with MCT oil, and check with your doctor if you have heart, liver, or blood sugar concerns.

Related reading

• Ultimate Guide to MCT Oil for Sustained Energy
• MCT Oil for Weight Loss: Science Behind Satiety
• Weight Loss Coffee and Intermittent Fasting: A Powerful Duo?

Ready to put this into practice? Explore Lean Joe Bean Weight Loss Coffee and Superfood Mushroom Coffee.