Overnight soak vs quick soak – which is better when canning beans?
If you've ever prepared dried beans for pressure canning, you've probably come across two different methods: soaking them overnight or using the much faster quick-soak method. But is one actually better than the other? Does it affect the texture, the taste, or even the safety of your canned beans? Let's have a closer look.
Why do we soak beans before canning?
When we're cooking dried beans for dinner, soaking is often simply a way of reducing the cooking time. Some people skip soaking altogether and just cook their beans a little longer.
Pressure canning, however, is a different matter.
Dried beans absorb a considerable amount of water as they rehydrate. If we put dry beans directly into canning jars, they will expand during processing, potentially absorbing too much of the liquid and affecting the conditions under which heat penetrates the jars.
This is why the USDA's tested procedure for pressure canning dried beans and peas requires them to be hydrated before they're packed into jars.
And here's the interesting part: the USDA allows two different soaking methods.
You can soak your beans overnight, or you can use a quick-soak method that takes just over an hour.
Both are accepted preparation methods when following the USDA's dried beans and peas canning procedure.
Method 1: The traditional overnight soak
This is probably the method most of us grew up with. You put your beans in a large pot, cover them with water, and leave them until the following day.
It's simple, requires very little effort, and doesn't involve any cooking during the soaking stage.
How to do it:
Sort through your dried beans, removing any damaged beans, stones or debris.
Rinse them thoroughly under running water.
Place them in a large pot and cover generously with cold water.
Leave them to soak for 12–18 hours in a cool place. I recommend using the refrigerator, particularly in warmer weather.
Drain and discard the soaking water.
Your beans are now ready for the next preparation step before pressure canning.
Advantages of overnight soaking
The biggest advantage is convenience, provided you've planned ahead.
You can prepare the beans in the evening, go to bed, and have them ready to continue with the following morning.
There's no need to watch a boiling pot or set a timer.
The slow hydration may also help the beans retain their appearance during subsequent cooking, although results depend on the bean variety, age and handling.
Disadvantages of overnight soaking
The obvious disadvantage is time.
If you suddenly decide on a Sunday morning that you'd like to pressure can a batch of beans, the overnight method isn't particularly helpful!
You also need to make sure the beans are kept cool while soaking. This is especially important during summer, when leaving a pot of beans sitting in a warm kitchen for 12–18 hours isn't a good idea at all.
Method 2: The quick-soak method
Now, this is my favorite bit.
The quick-soak method allows you to prepare dried beans for canning without having to plan the previous evening.
Instead of relying on a long period in cold water, we use boiling water to speed up the hydration process.
How to do it:
Sort and rinse your dried beans.
Place them in a large pot and cover generously with water.
Bring the water to a boil and boil for 2 minutes.
Remove the pot from the heat.
Leave the beans to soak in the hot water for 1 hour.
Drain and discard the soaking water.
And that's it! Your beans are ready for the next preparation step.
Advantages of quick soaking
The biggest advantage is obviously the time saved.
Instead of waiting until tomorrow, you can prepare your beans and get your pressure canner running on the same day.
For anyone who enjoys batch cooking or preserving food during the weekend, this can be extremely useful.
Quick soaking also helps hydrate the beans and allows you to discard the soaking water, just as you would with the overnight method.
Disadvantages of quick soaking
It requires a little more attention at the beginning. You need to bring the beans to a boil, time the two minutes, and then remember to drain them after an hour.
Depending on the bean variety, you may also notice some differences in how evenly the beans soften or how many split during cooking.
However, there isn't strong evidence that one of the two USDA soaking methods consistently gives you better canned beans than the other.
Overnight soak vs quick soak – a comparison
Overnight soak | Quick soak | |
Soaking time | 12–18 hours | 1 hour, after boiling |
Initial boiling | No | 2 minutes |
Planning required | Yes | Minimal |
Suitable for USDA dried-bean canning procedure | Yes | Yes |
Additional 30-minute boil before canning | Required | Required |
Best for | Planned canning sessions | Same-day canning |
Does soaking affect digestion?
We've all heard the jokes about beans and their rather unfortunate effects on digestion!
Beans contain certain carbohydrates called oligosaccharides that our digestive systems cannot fully break down. When these reach the large intestine, bacteria ferment them, which can produce gas.
Soaking beans and discarding the soaking water can help reduce some of these compounds.
But is overnight soaking better than quick soaking?
Not necessarily.
Both methods can reduce some of the gas-producing compounds, and the amount removed depends on several factors, including the bean variety, soaking conditions and subsequent cooking.
Longer soaking doesn't automatically mean better digestion, and quick soaking shouldn't be considered an inferior method.
For me, the important point is that both methods involve draining and discarding the soaking water before continuing with the canning preparation.
Does one method give firmer canned beans?
This one really matters, especially when we're preserving beans that will end up in salads, soups, stews or other meals.
Nobody wants a jar of completely disintegrated beans when they were expecting lovely, individual beans!
However, the final texture depends on much more than the soaking method.
The variety of bean, how old the dried beans are, their storage conditions and the cooking and pressure-canning process can all influence the result.
Some beans naturally hold their shape better than others.
And remember, pressure-canned beans will generally be softer than beans cooked briefly on the stovetop.
If you want to compare the two soaking methods for yourself, try using beans from the same bag and canning them in separate batches, following exactly the same tested processing instructions.
That way, you'll have a much better idea of whether one method produces a texture you prefer.
The important step both methods have in common
Here's something that's easily misunderstood.
The soaking stage is not the end of the preparation.
Regardless of whether you've soaked your beans overnight or used the quick-soak method, the USDA's dried beans and peas canning procedure requires another step before filling your jars.
After draining the soaking water, cover the beans with fresh water and boil them for 30 minutes.
Only then are the beans packed hot into jars with their cooking liquid, leaving 1 inch (2.5 cm) of headspace.
The jars then go into the pressure canner at the right pressure for your altitude and canner type (see my altitude chart). I'm at 2,273 feet, so I use 15 lb on my weighted gauge.
For the USDA dried beans and peas procedure, the processing times are:
Pint jars: 75 minutes
Quart jars: 90 minutes
These times apply to the specified hot-pack preparation, with the correct processing pressure adjusted for altitude.
The boiling and pressure-canning stages serve different purposes. The pressure-canning process is necessary because beans are low-acid foods that require temperatures above those achieved in ordinary boiling-water canning.
You cannot simply skip the preparation steps and assume that the long pressure-canning time will compensate.
Can I put dried beans directly into the jars?
You may have seen people online adding dried beans directly to jars, pouring water over them and processing them without soaking or pre-cooking.
This is often called the dry canning or no-soak method.
It might look convenient, but it isn't the method tested and recommended by the USDA.
The tested procedure specifies hydrated beans that have been boiled for 30 minutes before hot packing.
Changing those preparation steps can affect the amount of liquid in the jar, expansion of the beans and heat penetration during processing.
For that reason, I recommend following the tested procedure rather than experimenting with dry beans directly in jars.
After all, the purpose of home canning is to create food that we can safely store and enjoy months later.
So, which soaking method do I prefer?
For me, it really comes down to planning.
If I know that I'm going to spend the following day canning beans, the overnight method makes perfect sense. I can prepare everything the evening before, and the beans will be ready when I start my canning session.
But if I suddenly decide that today would be a good day to fill a few empty spaces in my pantry shelves, the quick-soak method is incredibly convenient.
There's something rather satisfying about deciding in the morning to preserve a batch of beans and having the finished jars cooling on the kitchen counter later that day!
And since both methods are included in the USDA's tested canning procedure, I don't feel the need to insist on one over the other.
The bottom line
Overnight soaking and quick soaking are simply two different ways of achieving the same essential preparation step: hydrating dried beans before pressure canning.
Neither method is automatically better.
The overnight method is wonderfully simple if you're organized enough to plan ahead. The quick-soak method is perfect when time is limited or you decide to start a canning project spontaneously.
What matters most is following the complete tested canning procedure, including the 30-minute boil after soaking and the correct pressure-canning process.
And if there's one thing I'd like you to take away from this post, it's this:
You don't need to soak your beans overnight and then quick-soak them as well. Choose one method, follow it properly, and continue with the tested canning instructions.
Ready to put it into practice? Try my garbanzo beans, garbanzo beans with veggies, refried beans or Spanish-style lentils ;)
Happy canning!
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