What Is Beans vs. Lentils (Cooking Time Guide)

Dried beans usually need soaking and about 60–120 minutes of simmering; lentils need no soak and often cook in 10–30 minutes. Times vary with type, age, altitude, and water chemistry, so test for tenderness rather than relying on the clock alone. For kidney beans, use a vigorous boil for at least 30 minutes before simmering.

A lentil may be ready before you have finished setting the table; a bean may still be firm after the recipe says “one hour.” That is not your stove being difficult. Beans and lentils are different legumes, and their size, structure, and preparation needs affect the cooking time. Here is how to choose, cook, and check each one without guesswork.

Choose and Prepare Beans or Lentils

Beans and lentils are both legumes, but dried beans are generally larger and take longer to soften. Lentils usually cook without soaking. The key first step is to identify the type, remove debris, and prepare it for even cooking.

Dried beans include varieties such as black, navy, pinto, and kidney beans. Lentils include brown, green, red, and yellow types. Red and yellow lentils are often split and cook faster than whole brown or green lentils. Check the package for the exact variety and any instructions, then use the ranges below as a starting point.

These are practical ranges, not guarantees. Old beans may take longer, and altitude and water chemistry can change how quickly legumes soften. Start checking at the early end of the range, then continue cooking as needed.

Sort, rinse, and soak

Before cooking, spread dried legumes out and remove small stones or damaged pieces. Rinse them under running water. Lentils generally do not need soaking; soaking is optional for beans.

Soaking beans for 8–12 hours can shorten cooking and help them hydrate more evenly. Cover them well with water because they expand as they absorb it. When the soak is done, drain and rinse the beans, then cook them in fresh water. If you skip soaking, plan for a longer cook and check tenderness regularly.

Key takeaway: Identify the variety, rinse everything, and treat soaking as an option for most beans, not a requirement for lentils.

Simmering Times, Water, and Doneness

Cooking time is the period needed for the center of a legume to soften, not a fixed timer setting. Use enough water, maintain a gentle simmer, and taste or test a few pieces near the estimated finish time. The goal is tender throughout, not merely a soft outer skin.

Use the right pot and heat

A heavy-bottomed stainless-steel or enameled pot helps hold steady heat and makes it easier to maintain a gentle simmer. For induction, confirm the pot has a magnetic, induction-compatible base. You do not need a special “maximum-temperature” rating for this water-based method.

Bring the cooking water to a boil, then lower the heat. At sea level, a gentle simmer is roughly 90–96°C (194–205°F); water boils near 100°C (212°F). At higher altitudes, water boils at a lower temperature, so legumes may take longer. Keep the surface moving gently rather than letting the pot boil hard throughout.

Uncoated aluminum and bare cast iron can react with acidic ingredients. With either, wait until the legumes are tender before adding tomatoes, vinegar, or other acidic foods. This also avoids letting acidity delay softening.

Match water to the legume

For lentils, start with about 3 cups of water per 1 cup of dry lentils. Bring the water to a boil, reduce to a simmer, and cook until tender. If liquid remains, drain it; if the pot becomes dry before the lentils are done, add more hot water.

For beans, cover them with several inches of fresh water and keep them submerged as they cook. Check the pot now and then and add water if the level drops. A partially covered pot helps limit evaporation while allowing some steam to escape.

Cook kidney beans safely

Kidney beans need an extra safety step. Soak them, discard the soak water, and cover them with fresh water. Bring the beans to a vigorous boil for at least 30 minutes, then lower the heat and simmer until tender.

Do not cook dried kidney beans only at a low temperature, including in a slow cooker. A slow cooker’s low heat is not a safe substitute for the vigorous boil. Inadequately boiled kidney beans can retain phytohaemagglutinin, a toxin that can cause illness. Once the required boil is complete, keep simmering until the beans are fully tender.

Check for doneness

Begin checking lentils at the low end of their time range. Check beans after about an hour of simmering, sooner if they are small or were soaked. Taste several pieces, since a single bean may not show how evenly the pot has cooked.

A cooked lentil or bean should be tender through the center. Beans should be creamy-tender, not chalky or firm inside. If they are still firm, keep simmering and test again every 10–15 minutes. Add salt during cooking to taste; add acidic ingredients after tenderness.

Key takeaway: Follow the kidney-bean boil rule, keep beans covered with water, and use texture as the final test.

Safe Storage and Cookware Care

Cooked beans and lentils need prompt cooling and refrigeration. Treat leftovers like other cooked foods: use shallow containers so they cool faster, and do not leave them at room temperature beyond the recommended limit. Let the pot cool before washing it.

After cooking, turn off the heat and transfer leftovers to shallow containers. Refrigerate within 2 hours, or within 1 hour if the room is hotter than 32°C (90°F). Shallow containers help the food cool more quickly than a deep, full pot.

Avoid putting a hot pot under cold water. A sudden temperature change can stress cookware. Once the pot has cooled, wash it with warm water and a nonabrasive sponge. This is especially useful for enameled surfaces, which can be damaged by harsh scouring.

Key takeaway: Cool leftovers promptly in shallow containers, then clean the cooled pot gently.

Serving: Texture, Seasoning, and Pairings

The best choice between beans and lentils depends on the texture and timing you want. Lentils are often the faster option for a weeknight meal; beans take longer but stay substantial and can be cooked in a larger batch. Choose based on the dish, then season to taste.

Brown and green lentils tend to hold their shape better than split red or yellow lentils, which soften and break down readily. That makes brown or green lentils useful when you want distinct pieces, while split lentils suit soups or dishes where a softer texture works well.

Beans are a good fit when you want a tender, creamy center that still holds its shape. Their long cooking time makes them less suited to a last-minute meal unless they are already cooked. For either legume, add tomatoes, vinegar, or other acidic ingredients after it is tender, especially when cooking in uncoated aluminum or bare cast iron.

I plan around the slowest ingredient when a meal includes both legumes and other components. Lentils may be ready in 10–30 minutes, while soaked beans commonly need 60–120 minutes. Cooking them separately gives you more control over texture and avoids keeping the faster-cooking lentils on the heat too long.

Key takeaway: Choose whole lentils for a faster, more distinct texture; choose beans when you have time for a longer simmer.

Frequently Asked Questions

These answers cover common timing and preparation questions that affect whether beans or lentils fit your meal. Exact results vary by variety and age, so use the listed times as checks, not promises. Taste for tenderness, and follow the kidney-bean safety step every time.

Are lentils the same as beans?
No. Both are legumes, but lentils are usually smaller and cook faster. Most lentils do not need soaking; dried beans often benefit from an 8–12-hour soak.

Which cooks faster, beans or lentils?
Lentils usually cook faster. Red or yellow split lentils take about 10–15 minutes, and brown or green lentils take about 20–30 minutes. Soaked beans commonly take 60–120 minutes.

Do I have to soak dried beans?
No. Soaking is optional, but an 8–12-hour soak often shortens cooking and promotes even hydration. Drain and rinse soaked beans before cooking them in fresh water.

How much water should I use for lentils?
Start with about 3 cups of water for each cup of dry lentils. Add more if the pot dries before they are tender, or drain excess water after cooking.

How much water do beans need?
Cover beans with several inches of water and add more if needed to keep them submerged. The exact amount depends on the pot and how much evaporates.

How can I tell when beans or lentils are done?
Taste a few pieces. They should be tender through the center, without a hard or chalky spot. If they are still firm, keep simmering and check again.

Can I put tomatoes in while beans cook?
Wait until the beans are tender before adding tomatoes, vinegar, or other acidic ingredients. This is especially important when using uncoated aluminum or bare cast iron.

Can dried kidney beans cook only in a slow cooker?
No. Soak them, discard the soak water, cover with fresh water, and boil vigorously for at least 30 minutes before simmering until tender. A slow cooker’s low heat does not replace this step.

Why are my beans taking longer than the guide says?
Age, variety, altitude, and water chemistry all affect cooking time. Keep the beans submerged and simmer until tender rather than treating a time estimate as a deadline.

Can I cook beans and lentils together?
You can, but their cooking times differ. Lentils may turn soft before beans finish. Cooking them separately gives more control over their texture.

(This article was written by one of our staff writers, Julian R. Hayes. Visit our Meet the Team page.)