A Marked Sinigang Kaldero: Track Water Loss Without Mistaking Solids for Broth

Sinigang can become sharper or saltier as water evaporates, but a low line in the pot does not by itself measure that loss. Meat, bones and vegetables displace liquid; serving a bowl or adding greens changes the level again. A marked kaldero is useful when its marks are interpreted correctly. Use them to record the cooking process, then adjust fully cooked broth in measured steps.

Establish a safe reference level

Calibrate the cool empty pot with a measuring jug, noting existing volume marks or using an outside reference that cannot contact food. A food-grade measuring stick designed for cooking is another option. The marks measure water-only volume. Once chicken, fish or vegetables go in, a 3 L level is the volume occupied by the whole mixture, not 3 L of free broth. Avoid pen marks inside the pot or improvised painted sticks.

Recognise what evaporation actually changes

For a repeatable water-loss estimate, run a water-only trial before cooking: measure 3.0 L, heat with the intended lid and simmer setting, then let the pot cool safely before measuring what remains. If 2.7 L remains after the recorded interval, that trial lost 300 mL. Soup will not necessarily lose water at the same rate. During cooking, note lid changes, additions, spills and servings; pot height alone cannot separate evaporation from those changes. Broth concentration is a different question from choosing sinigang souring agents.

Restore the level before adding more flavour

Use the chosen recipe's cooking sequence and check its protein is fully cooked before tasting. Then add potable hot water in small recorded amounts—100 mL at a time is a manageable starting step for a large pot—stir, return the soup to a simmer and taste a cooled spoonful with a clean spoon. Stop when the balance suits the dish. A 2.5 L target minus 2.1 L measured free broth equals 400 mL, but that arithmetic is valid only if the liquid was measured separately from solids; it cannot be read straight from a crowded pot. Source 2 Source 1

Keep the record for the next large pot

If exact broth yield matters, measure it while portioning the finished soup with a ladle into a heat-safe measuring vessel, keeping solids separate in clean, safely hot service containers. Do not lift and tip a heavy boiling kaldero merely to obtain a number. Add the measured liquid portions together and record serving losses. Twelve genuinely full 150 mL ladles of liquid total 1.8 L; twelve scoops containing meat and vegetables do not establish that broth volume.

Five practical steps

1. Calibrate a cool pot with measured water and a food-safe reference system.
2. Treat marks as total occupied volume once solid ingredients are added.
3. Record lid position, added liquid, spills and any servings taken out.
4. Finish cooking the protein before tasting; add measured hot water gradually and return to a simmer.
5. Measure free broth separately only when a precise yield is needed, using safe ladling rather than lifting the full pot.

An evaporation trial, clearly labelled

• Starting plain water: 3.0 L, measured before heating.
• Remaining plain water after the trial and safe cooling: 2.7 L.
• Measured loss in this example: 0.3 L, or 300 mL.
• Soup application: a planning observation; ingredient displacement and water release prevent treating it as a guaranteed broth correction.

Keep the volume note alongside the recipe, pot and lid setting. When scaling a kaldero for more guests, check working capacity and headroom separately: a useful broth target must still fit the vessel safely.