First decide whether the stew is actually too thin
Stew thickens as it cools. Before adding anything, remove the lid and simmer for 5 to 10 minutes. This evaporates water and concentrates flavour. Stop if the meat or vegetables are already at risk of overcooking.
Flour cooked with the aromatics
Sprinkle flour over cooked onions or browned meat, stir for a minute and add liquid gradually. This gives an opaque, gravy-like body. It works well in beef and chicken stews but is not gluten-free.
Starch slurry
Mix cornstarch, potato starch or arrowroot with cold water until completely smooth. Stir a small amount into simmering stew and wait before adding more. Starches vary in strength, and too much can create a gummy texture.
Mashed potatoes or beans
Remove a few tender pieces, mash them and return them to the pot. This produces a natural, rustic thickness and avoids a separate thickener. It is particularly useful for white bean, potato and chickpea stews.
Red lentils
Red lentils break down during cooking and can become part of the sauce. They are best planned from the beginning because they need time to soften and absorb liquid.
Purée a portion
Blend one or two ladles of vegetables and broth, then stir the purée back in. Use caution with hot liquid and never overfill a blender. An immersion blender can be used briefly right in the pot.
Reduction versus added starch
Reduction intensifies everything, including salt. Starch changes texture without concentrating salt. If the stew already tastes strongly seasoned, choose starch or mashed vegetables rather than prolonged reduction.
Why lumps form
Dry starch clumps when its outer surface hydrates before the inside disperses. Mix starch with cold liquid first, or whisk hot liquid gradually into a cooked flour base. Do not shake flour directly over a finished pot.
Reviewed July 27, 2026.