Making Coffee More Alkaline With Baking Soda

Quick answer

• Adding a small amount of baking soda can reduce coffee’s acidity.
• The goal is to neutralize some of the acids that contribute to a sour or bitter taste.
• Too much baking soda will negatively impact flavor and can create a soapy or salty taste.
• Start with a very small amount, like 1/16 to 1/8 teaspoon per 8 oz cup.
• Observe the taste; if it’s still too acidic, you can add a tiny bit more, but proceed with caution.
• This method is a quick fix for reducing perceived acidity, not a way to fundamentally change coffee’s chemical composition for health benefits.

Who this is for

• Coffee drinkers who experience stomach upset or heartburn from acidic coffee.
• Home brewers looking for a simple, inexpensive way to adjust their coffee’s flavor profile.
• Individuals interested in experimenting with taste without investing in specialized brewing equipment or beans.

What to check first

Brewer type and filter type

The brewing method and filter can influence the perceived acidity of your coffee. For instance, paper filters can remove some oils and fine particles that might contribute to a more bitter or acidic taste, while metal or cloth filters allow more of these through.

Water quality and temperature

The water you use is crucial. Hard water can sometimes interact with coffee compounds to create a more acidic-tasting brew. Water that is too hot can over-extract the coffee, leading to bitterness and increased acidity, while water that is too cool can under-extract, resulting in a sour taste. Aim for a temperature between 195°F and 205°F for optimal extraction.

Grind size and coffee freshness

The grind size needs to match your brewing method. Too fine a grind can lead to over-extraction and bitterness, while too coarse a grind can result in under-extraction and sourness. Freshly roasted and ground coffee generally offers a more balanced flavor. Stale coffee can taste flat or overly bitter, masking its natural acidity.

Coffee-to-water ratio

The ratio of coffee grounds to water significantly impacts strength and flavor. Too little coffee can lead to a weak, sour brew, while too much can result in an overly strong, bitter cup. A common starting point is a ratio of 1:15 to 1:18 (grams of coffee to grams of water), which is roughly 2 tablespoons of coffee per 6 oz of water.

Cleanliness/descale status

A dirty coffee maker or kettle can impart off-flavors, including bitterness and a metallic taste, which can exacerbate the perception of acidity. Regularly cleaning your equipment and descaling it (especially if you have hard water) is essential for a clean, balanced cup.

Step-by-step (brew workflow)

1. Measure your coffee beans.

• What “good” looks like: Accurate measurement ensures consistent results. For example, using a scale to measure 20 grams of coffee beans for a 10-12 oz brew.
• Common mistake: Guessing the amount. This leads to inconsistent extraction and flavor.
• How to avoid it: Use a kitchen scale or a standard measuring scoop for consistency.

2. Grind your coffee beans.

• What “good” looks like: A consistent grind size appropriate for your brewing method (e.g., medium-fine for pour-over, coarse for French press).
• Common mistake: Using a blade grinder that produces uneven particle sizes, or grinding too far in advance.
• How to avoid it: Use a burr grinder for uniform grinds and grind just before brewing.

3. Heat your water.

• What “good” looks like: Water heated to the optimal brewing temperature, typically between 195°F and 205°F.
• Common mistake: Boiling water directly poured onto grounds, which can scorch them and create bitterness.
• How to avoid it: Use a temperature-controlled kettle or let boiling water sit for about 30-60 seconds before pouring.

4. Prepare your brewing device.

• What “good” looks like: Your brewer is clean, and the filter is properly in place and rinsed (if using a paper filter).
• Common mistake: Forgetting to rinse paper filters, which can leave a papery taste.
• How to avoid it: Thoroughly rinse paper filters with hot water to remove any paper residue and preheat your brewing vessel.

5. Add coffee grounds to the brewer.

• What “good” looks like: The grounds are evenly distributed in the filter or brewing chamber.
• Common mistake: Tamping down the grounds too much, which can impede water flow.
• How to avoid it: Gently shake the brewer to level the grounds without compacting them.

6. Add a small amount of baking soda (optional).

• What “good” looks like: A tiny pinch (e.g., 1/16 to 1/8 teaspoon per 8 oz of water) is dissolved in the water or added to the grounds.
• Common mistake: Adding too much baking soda, which will ruin the taste.
• How to avoid it: Start with a very small amount and taste. You can always add a tiny bit more, but you can’t take it out.

7. Bloom the coffee (for pour-over/drip).

• What “good” looks like: Pour just enough hot water (about twice the weight of the coffee) to saturate the grounds, then let it sit for 30 seconds. You’ll see the grounds expand and release CO2.
• Common mistake: Skipping the bloom or pouring too much water, which can lead to uneven extraction.
• How to avoid it: Use a gooseneck kettle for controlled pouring and observe the bubbling.

8. Pour the remaining water.

• What “good” looks like: Water is poured slowly and evenly, typically in stages or a continuous stream, ensuring all grounds are saturated.
• Common mistake: Pouring too quickly or unevenly, which can cause channeling and inconsistent extraction.
• How to avoid it: Use a gooseneck kettle for precise control and pour in a circular motion.

9. Allow the coffee to brew.

• What “good” looks like: The water passes through the grounds at the appropriate rate for your brewing method.
• Common mistake: Rushing the process or letting it go too long, leading to under- or over-extraction.
• How to avoid it: Follow recommended brew times for your specific brewer (e.g., 3-4 minutes for pour-over, 4 minutes for French press).

10. Remove the grounds/filter.

• What “good” looks like: The brewing cycle is complete, and the spent grounds are removed promptly.
• Common mistake: Leaving the grounds in contact with the brewed coffee for too long, which can lead to over-extraction and bitterness.
• How to avoid it: Immediately separate the brewed coffee from the grounds once brewing is finished.

11. Serve and taste.

• What “good” looks like: The coffee has a balanced flavor, with reduced perceived acidity and no off-tastes from the baking soda.
• Common mistake: Not tasting and adjusting if the acidity is still too high or if the baking soda has altered the flavor negatively.
• How to avoid it: Taste the coffee before adding any additional sweetener or milk, and make mental notes for your next brew.

Common mistakes (and what happens if you ignore them)

Mistake	What it causes	Fix
Using too much baking soda	Salty, soapy, or metallic taste; overpowering the coffee’s natural flavor.	Start with a tiny pinch (1/16-1/8 tsp per 8 oz); adjust incrementally if needed, always tasting.
Not dissolving baking soda properly	Gritty texture in the coffee; uneven neutralization of acidity.	Ensure baking soda is fully dissolved in the hot water before or during brewing.
Using stale coffee beans	Flat, bitter, or sour taste; masking any potential benefits of baking soda.	Use freshly roasted beans and grind them just before brewing for optimal flavor.
Incorrect grind size	Sour (too coarse) or bitter (too fine) coffee; poor extraction.	Match grind size to your brewing method; adjust finer for French press, coarser for drip.
Water temperature too high or too low	Scorched taste (too hot); sour, weak taste (too cool); poor extraction.	Aim for 195°F-205°F. Use a thermometer or let boiling water rest for 30-60 seconds.
Inconsistent coffee-to-water ratio	Weak and sour (too little coffee) or strong and bitter (too much coffee).	Use a scale for precise measurements or a consistent measuring scoop for every brew.
Dirty brewing equipment	Off-flavors, bitterness, and metallic tastes; can mimic or worsen acidity.	Clean your brewer, grinder, and mugs regularly; descale as needed.
Over-extraction (brewing too long)	Bitter, harsh, and astringent coffee; can mask subtle flavors.	Adhere to recommended brew times for your specific method.
Under-extraction (brewing too short)	Sour, weak, and thin coffee; lacks depth and sweetness.	Ensure sufficient brew time and proper water temperature for full flavor extraction.
Using tap water with high mineral content	Can lead to off-flavors and affect extraction, potentially increasing perceived acidity.	Use filtered or bottled water to ensure a cleaner, more consistent taste.

Decision rules (simple if/then)

• If your coffee tastes noticeably sour, then try grinding slightly finer because a finer grind increases surface area for better extraction.
• If your coffee tastes bitter, then try grinding slightly coarser because a coarser grind reduces extraction, lessening bitterness.
• If your coffee tastes weak and watery, then increase your coffee-to-water ratio (use more coffee) because more grounds will lead to a stronger brew.
• If your coffee tastes too strong, then decrease your coffee-to-water ratio (use less coffee) because fewer grounds will result in a milder cup.
• If your coffee tastes burnt or has a harsh aftertaste, then lower your water temperature because water that is too hot can scorch the grounds.
• If your coffee tastes dull or lacks complexity, then ensure you are using fresh beans and grinding them right before brewing because stale coffee loses its aromatic compounds.
• If you experience stomach discomfort after drinking coffee, then try adding a very small amount of baking soda (1/16 tsp per 8 oz) because it can help neutralize some of the acids.
• If the baking soda makes your coffee taste salty or soapy, then you have used too much, so reduce the amount in your next brew because the goal is subtle neutralization, not altering the flavor profile drastically.
• If your brewed coffee is consistently uneven in taste (some sips sour, some bitter), then check your grind consistency and pouring technique because an uneven grind or pour leads to uneven extraction.
• If your coffee maker has visible mineral buildup, then descale it before brewing because mineral deposits can impart a metallic taste and affect brewing performance.
• If you’re unsure about your water’s quality, then try brewing with filtered water because it removes impurities that can negatively affect taste.

FAQ

Does baking soda actually make coffee alkaline?

Yes, baking soda (sodium bicarbonate) is an alkaline substance. When added to acidic coffee, it can react with some of the acids, effectively neutralizing them and making the overall solution less acidic, or more alkaline.

How much baking soda should I add to coffee?

Start with a very small amount, typically 1/16 to 1/8 teaspoon per 8-ounce cup of coffee. It’s crucial to use sparingly, as too much will significantly alter the taste.

Will adding baking soda change the taste of my coffee?

Yes, it will change the taste. The goal is to reduce perceived acidity, but if too much is used, it can impart a salty, soapy, or metallic flavor that overpowers the coffee’s natural notes.

Is it safe to drink coffee with baking soda?

For most people, consuming the small amounts of baking soda recommended for coffee is generally considered safe. However, if you have specific health conditions or dietary restrictions, it’s always best to consult with a healthcare professional.

Can I use baking soda to make coffee less bitter?

Baking soda primarily neutralizes acids, which can contribute to sourness and sometimes bitterness. While it might indirectly reduce perceived bitterness by balancing the overall flavor, it’s not a direct solution for bitterness caused by over-extraction.

What kind of baking soda should I use?

Standard, food-grade baking soda found in most grocery stores is suitable. Ensure it’s fresh and hasn’t been contaminated.

How does baking soda compare to other methods of reducing coffee acidity?

Other methods include choosing low-acid coffee beans, using a darker roast, brewing with a French press (which retains oils that can buffer acidity), or using alkaline water. Baking soda is a quick, additive method, while others involve bean selection or brewing technique.

Can I add baking soda directly to my coffee grounds before brewing?

Yes, you can add the baking soda to the grounds before adding water, or dissolve it in the hot water before pouring. Ensuring it’s well-distributed or dissolved is key for even results.

Does adding baking soda affect the caffeine content?

No, adding baking soda does not affect the caffeine content of your coffee. Caffeine is a separate chemical compound, and the alkaline reaction of baking soda primarily targets organic acids.

What this page does NOT cover (and where to go next)

• Detailed chemical analysis of coffee acidity and alkalinity. For a deeper dive, research the specific organic acids present in coffee and their properties.
• Specific health claims or benefits associated with alkaline diets or coffee consumption. Consult a medical professional for health-related advice.
• Comparisons of different brands of baking soda or their purity. Standard food-grade baking soda is generally sufficient for this purpose.
• Advanced brewing techniques for acidity control beyond simple adjustments. Explore topics like cold brewing, specific roast levels, and bean varietals.