Ketchup

Taste and Texture

Sweet, sour, and salty flavors are combined, with a rich tomato aroma from cooked tomatoes and a light spice note. Depending on the product, sweetness, vinegar aroma, and onion/pepper-family aromas may stand out differently. Texture is smooth and thick, squeezable even when cold, and evenly loosens when heated. When mixed with juices from ingredients with high water content, it can become thin, so for a glossy coating sauce, add it at the end and simmer briefly.

Main uses

• Use as a dipping sauce for potatoes fries, nuggets, sausages, and egg dishes that are mild or fatty. The acidity cuts through the fatty taste, but it can taste overly sweet on fried foods that already have sauce.
• Add to fried rice, omelette rice, stir-fried noodles, and sausage/vegetable stir-fries to enhance the red color and tangy-sweet flavor. When sautéing in a pan, cook until the moisture reduces to concentrate the flavor.
• As a base for barbecue-style sauces, meatloaf glaze, or simple braising marinades. Rather than adding soy sauce, vinegar, and sugar all at once, add ketchup first and adjust only the missing saltiness or acidity to avoid overpowering flavors.
• Mix with gochujang-ketchup chicken wings to soften heat and give sauce body. This is an example of use in cooking records, but it does not mean the same ratio works for all chicken dishes; adjust to the amount of chicken and other seasonings sweetness.

Preparation tips

• Shake the bottle gently before use to mix the thin liquid at the top with the thicker portion for even flavor and consistency. If it has separated after a long time and the sauce is unusually liquid, it may not have been mixed at first.
• For stir-fry dishes, drain some moisture from ingredients before adding ketchup. If added directly to a pan with vegetables releasing a lot of water, the sauce will dilute and color may appear, but flavor may be diluted.
• When using as a cold sauce, spoon a portion into a small bowl and mix with other seasonings first to avoid lumps. If mixing with mayonnaise or mustard, the sweetness of ketchup will be central, so it is better not to add a large amount from the start.
• If the pan is too hot and dry, ketchup will burn quickly. Add it with oil or other sauces, or add a little water or stock to adjust the pan's surface consistency.

Cooking characteristics

• When heated, water evaporates and the sweetness, acidity, and tomato aroma intensify. When the sauce becomes thick enough to leave a trace on the spatula, it is in a good state to coat ingredients.
• Simmering on high heat for a long time can darken the edges and turn the sweetness toward a burnt bitter taste. Even when sautéing to release aroma, it is more stable to heat briefly and then add liquid or lower the heat.
• When reduced with sauces containing soy sauce or sugar, color deepens quickly and viscosity increases. Once the sauce starts sticking to ingredients, instead of continuing to reduce, turn off the heat and finish with residual heat to avoid becoming overly sticky.

Good combinations

• Goes well with potatoes, eggs, ham, sausages, and chicken—ingredients that are mild or salty. For fatty ingredients, a little vinegar or pickles can balance so ketchup’s sweetness feels less heavy.
• Onions, garlic, pepper, paprika, mustard, and Worcestershire sauce broaden ketchup’s tomato flavor. However, adding Worcestershire sauce and soy sauce together in large amounts can raise saltiness quickly, so add one, in small amounts, to taste.
• Mix with gochujang or chili powder to make a spicy-sweet glaze, great for grilling or braising chicken wings. If you want to preserve tomato aroma rather than heat, reduce gochujang and adjust with water or stock to control thickness.

Points to consider when substituting

• If the goal is a simple tomato flavor, you can use tomato paste or tomato sauce, but these may be less sweet and acidic than ketchup. After substituting, decide by tasting and adjust sugar and vinegar very gradually.
• If you need a dipping sauce, chili sauce, barbecue sauce, or mustard can be alternatives, but the flavor will differ greatly. For a sweet-tourable dipping profile with fries, the closest substitute is a tomato-based sauce with adjusted sweetness and acidity.
• For fried rice or noodles, you can use a small amount of tomato paste with added water to loosen and adjust sweetness and acidity. However, adding paste in the same amount as ketchup will be much denser and thicker, so start with less.
• Gochujang-ketchup wings are hard to fully replace with a single ingredient because ketchup handles sweetness, acidity, and viscosity together. It is possible to add tomato sauce with sugar or corn syrup and vinegar separately, but you must adjust according to other seasonings' saltiness and spiciness.