How Long Do Red Lentils Take to Cook?

How long red lentils take to cook depends on whether you are making soup or another dish. After rinsing, split red lentils typically soften and break down in boiling water in 15–25 minutes. The time can vary somewhat with the lentils' freshness and the water temperature. Because red lentils are small and hulled, they cook quickly without soaking compared with other dried legumes. For soup, cook them longer so they break down completely into a purée. For other dishes, shorten the cooking time so the lentils retain some shape. Older lentils that have been stored for a long time may take a little longer to soften than fresh ones, so adjust the cooking time as needed. Lentils absorb water and expand as they cook, so add enough water at the start to keep them from sticking to the bottom. Stirring occasionally also helps them cook evenly.

How to Cook Red Lentils to the Right Texture

Adjust the cooking time to the way you plan to use the lentils.

• Rinse the lentils several times, until the water runs clear.
• Add them to boiling water or vegetable broth and cook over low heat.
• For soup, cook for 20–25 minutes, until the lentils have completely broken down.
• For other dishes, reduce the cooking time to 15 minutes so the lentils remain slightly firm.
• Skim off any foam with a skimmer for a clearer soup.

Common Mistakes When Cooking Red Lentils

• Not rinsing the lentils can make the soup cloudy and give it a dusty taste.
• Adding salt too early can sometimes make the lentils take longer to soften.
• Cooking over high heat can make the water boil over and foam.
• Using too little water can cause the lentils to stick to the bottom and burn.

Why Does Red Lentil Soup Cook Longer?

For soup, the lentils are cooked until they break down and become smooth. They may be simmered for a little longer after softening or blended. For other dishes, the cooking time is shorter because the lentils are meant to retain some of their shape. Adjust the cooking time to suit the intended use.

Can You Cook Red Lentils Without Soaking Them?

Yes. Hulled red lentils are small, so they do not need to be soaked in advance like chickpeas or dried beans. Rinsing them several times is enough to remove surface dust and starch. This makes them a practical legume for quick soups and other dishes. Unlike whole green or brown lentils, red lentils cook in a relatively short time.

As a general guide, red lentils take about 15–25 minutes to cook, depending on their intended use. Rinsing them, cooking over low heat, and using enough water can help them soften and reach the desired texture. Because cooking time varies with freshness, check the lentils and stop cooking when they reach the texture you want.