Bulletproof Coffee With Salted Butter: Does It Work?

Quick answer

Yes, you can make bulletproof coffee with salted butter, but it will alter the flavor profile.
The salt in the butter can add an unexpected savory note to your drink.
For a traditional bulletproof coffee flavor, unsalted butter is generally preferred.
If you don’t mind a slightly salty coffee, using salted butter is a convenient option.
You might need to adjust other ingredients to balance the saltiness.
Taste as you go and be prepared for a unique beverage experience.

Who this is for

Those curious about adapting bulletproof coffee recipes with ingredients they already have on hand.
Individuals who enjoy experimenting with flavor variations in their morning beverages.
People looking for quick and accessible ways to prepare bulletproof coffee without a special trip to the store.

What to check first

Brewer type and filter type

What to check: What kind of coffee maker are you using (drip, pour-over, French press, etc.)? What type of filter (paper, metal, cloth)?
Why it matters: Different brewing methods and filter types extract coffee oils and fines differently, which can impact the final texture and clarity of your bulletproof coffee. Paper filters generally remove more oils than metal or cloth filters.
Common mistake: Using a filter that allows too many coffee grounds or fines into the final cup, leading to a gritty texture that can be unpleasant when blended with butter and oil. Always ensure your filter is properly seated and not damaged.

Water quality and temperature

What to check: Is your tap water heavily chlorinated or does it have a strong mineral taste? What is the temperature of your brewing water?
Why it matters: Water makes up the vast majority of your coffee. Poor-tasting water will result in poor-tasting coffee, regardless of other ingredients. Optimal brewing temperatures (typically 195-205°F) are crucial for proper extraction.
Common mistake: Using water that’s too cool, which leads to under-extraction and a weak, sour coffee. Conversely, water that’s too hot can scorch the grounds, resulting in a bitter taste. For bulletproof coffee, a consistent temperature is key for smooth emulsification.

Grind size and coffee freshness

What to check: Is your coffee freshly roasted and ground just before brewing? What is the grind size for your chosen brewing method?
Why it matters: Stale coffee loses its aromatic compounds and develops flat, undesirable flavors. The correct grind size ensures optimal contact time with water for balanced extraction.
Common mistake: Using pre-ground coffee that has been sitting in the pantry for weeks or months. The flavor will be diminished. For most drip and pour-over methods, a medium grind is appropriate. Too fine a grind can lead to over-extraction and bitterness, while too coarse can result in under-extraction and weakness.

Coffee-to-water ratio

What to check: How much coffee grounds are you using per cup (or ounce) of water?
Why it matters: This ratio, often referred to as the “brew ratio,” dictates the strength and flavor intensity of your coffee. A common starting point is a 1:15 to 1:18 ratio (grams of coffee to grams of water).
Common mistake: Eyeballing the amount of coffee and water, leading to inconsistent results. Too little coffee will make your base brew weak, and it will be harder to mask the butter and oil flavors. Too much coffee can make it overly bitter, which will be amplified by the added fats.

Cleanliness/descale status

What to check: When was the last time your coffee maker and grinder were thoroughly cleaned and descaled?
Why it matters: Coffee oils and mineral deposits can build up over time, imparting stale or off-flavors to your brew. This is especially important when adding fats, as any off-flavors will be more noticeable.
Common mistake: Neglecting regular cleaning and descaling. This leads to a buildup of rancid coffee oils and mineral scale, which can significantly degrade the taste of your coffee and potentially damage your equipment.

Step-by-step (brew workflow)

1. Brew your base coffee.

What to do: Prepare your coffee as you normally would, using your preferred brewing method and a good quality, freshly ground coffee. Aim for a strong, clean-tasting brew.
What “good” looks like: A hot, aromatic cup of coffee that tastes good on its own.
Common mistake: Brewing weak coffee. This will make it difficult to achieve a balanced bulletproof coffee, as the fats will be more prominent. Avoid under-extracting by ensuring proper grind size and water temperature.

2. Add fats to the blender.

What to do: Pour your hot brewed coffee into a high-powered blender. Add your chosen fats: 1-2 tablespoons of unsalted butter (or your salted butter) and 1-2 tablespoons of MCT oil or coconut oil.
What “good” looks like: The fats are in the blender, ready to be emulsified with the coffee.
Common mistake: Adding the fats to the coffee before brewing or after blending. They need to be in the blender with the hot coffee to emulsify properly.

3. Consider salt adjustment.

What to do: If you are using salted butter, taste a tiny bit of the butter first. If it’s very salty, you might want to omit any additional salt. If it’s mildly salted, you may still add a tiny pinch of sea salt if desired for flavor enhancement, but be cautious.
What “good” looks like: You have a clear understanding of your salted butter’s saltiness and a plan for additional salt.
Common mistake: Adding a full pinch of salt without considering the salt already in the butter, leading to an overly salty beverage.

4. Blend on low speed.

What to do: Secure the lid on your blender. Start blending on a low speed for about 15-20 seconds.
What “good” looks like: The ingredients are beginning to incorporate, but the mixture is not yet fully emulsified.
Common mistake: Starting on high speed immediately, which can cause the hot liquid to expand rapidly and potentially create a mess or even a dangerous situation if the lid isn’t secure.

5. Increase speed and emulsify.

What to do: Gradually increase the blender speed to high and blend for 30-60 seconds, or until the mixture is frothy and emulsified.
What “good” looks like: The coffee, butter, and oil have combined into a smooth, creamy, latte-like consistency with a layer of foam on top. There should be no visible separation of oil or butter.
Common mistake: Not blending long enough. Inadequate blending will result in an oily, separated drink rather than a smooth, integrated beverage.

6. Check the consistency and taste.

What to do: Carefully pour a small amount into a spoon and taste. Check the texture and flavor.
What “good” looks like: A smooth, creamy, and palatable drink. If using salted butter, the saltiness should be a subtle enhancement or a flavor you’ve intentionally adjusted for.
Common mistake: Not tasting and adjusting. You might find it too salty, not creamy enough, or lacking sweetness (if you add any).

7. Adjust as needed.

What to do: If it’s too salty, you might add a touch more unsalted butter or oil, or even a tiny bit of sweetener to balance. If it’s not creamy enough, add a bit more butter or oil and re-blend briefly. If it’s too bitter from the base coffee, this is harder to fix but can sometimes be mitigated with a touch of sweetener.
What “good” looks like: You’ve made minor adjustments to achieve your desired flavor and texture.
Common mistake: Over-adjusting, leading to an even more unbalanced flavor profile. It’s better to start with good ingredients and a solid base brew.

8. Pour and serve immediately.

What to do: Pour your freshly blended bulletproof coffee into a mug.
What “good” looks like: A warm, frothy beverage ready to be enjoyed.
Common mistake: Letting it sit for too long. The emulsification will start to break down, and it won’t have the same desirable texture.

Common mistakes (and what happens if you ignore them)

Mistake	What it causes	Fix
Using stale coffee grounds	Weak, flat, or bitter coffee; off-flavors amplified by fats.	Use freshly roasted and ground coffee.
Incorrect grind size for brewing method	Under-extracted (sour, weak) or over-extracted (bitter) base coffee.	Adjust grind to suit your brewer; medium for drip/pour-over, coarser for French press.
Using poor quality or chlorinated water	Unpleasant taste in the final beverage, masking good coffee flavors.	Use filtered water.
Brewing with water that’s too hot or too cool	Scorched (bitter) or under-extracted (sour, weak) coffee.	Aim for 195-205°F (90-96°C).
Not blending long enough	Separated, oily drink; not creamy or frothy.	Blend on high speed for 30-60 seconds until fully emulsified.
Using a non-high-powered blender	Incomplete emulsification, resulting in an oily, separated texture.	A standard blender might struggle; a high-powered blender is ideal for true emulsification.
Adding too much salt (if using salted butter)	Overpowering salty flavor that clashes with the coffee and fats.	Taste salted butter first, add salt very sparingly or omit entirely.
Not cleaning the blender thoroughly	Lingering oil or coffee residue affecting the taste of future blends.	Wash blender immediately after use; periodically deep clean.
Letting the blended coffee sit too long	Emulsification breaks down, leading to separation and a less desirable texture.	Drink immediately after blending.
Using low-quality fats	Unpleasant taste or texture; potential for fats to go rancid quickly.	Use good quality, fresh butter and MCT/coconut oil.

Decision rules (simple if/then)

If your salted butter is very salty, then omit any added salt because the butter already provides a significant salty flavor.
If your base coffee tastes bitter, then consider using a slightly coarser grind next time because a finer grind can lead to over-extraction.
If your bulletproof coffee separates after blending, then you likely didn’t blend long enough or your blender isn’t powerful enough because sufficient blending is key to emulsification.
If your bulletproof coffee tastes weak, then increase the amount of coffee grounds in your next brew because a stronger base coffee is needed to balance the fats.
If you notice a “greasy” mouthfeel, then you might have used too much oil or butter, or the emulsification wasn’t complete, so try adjusting the fat ratio or blending longer.
If your salted butter has a mild saltiness, then you can add a tiny pinch of sea salt to enhance flavors, but only if you enjoy a subtle salty note.
If your coffee tastes sour, then your brewing water might be too cool, so ensure it’s within the 195-205°F range for proper extraction.
If you’re aiming for a traditional bulletproof coffee flavor, then use unsalted butter because salted butter will introduce a noticeable savory element.
If your blender lid is not secure, then do not blend hot liquids at high speed because this can cause a dangerous overflow and mess.
If your bulletproof coffee has an off-flavor, then check the freshness of your coffee beans and fats, as rancidity can be amplified by the blending process.
If your coffee tastes bland even after blending, then ensure you’re using fresh, high-quality beans and the correct coffee-to-water ratio for your brew.

FAQ