Common styles in this category include butter chicken, tikka masala and Madras (Madras-style) simmer sauces.
Spice levels range from mild to spicy: several simmer sauces are described as having mild heat, while at least one product is explicitly labeled spicy.
These sauces appear as pastes or ready-to-use/ready-to-eat liquids sold in single jars (often resealable glass) and sometimes in multi-pack configurations.
Single jars range from about 8.45 ounces up to 15 ounces (examples include 8.45 oz; 12.5 oz; 12 fl oz; 14 oz / 400 g; 15 oz). Some listings are sold as a 6‑pack totaling 84 ounces.
Labels and descriptions commonly state no artificial flavors, synthetic colors or artificial preservatives; some listings also call out no MSG or no fillers.
Some simmer sauces are labeled "Reduced Fat Reduced Sodium," including reduced-fat/reduced-sodium tikka masala and reduced-fat butter chicken options.