Filipino Adobong Pusit: Squid Cooked in Its Own Ink
Filipino adobong pusit (pusit — squid) is a squid adobo dish where the squid is cooked using the squid's own ink sac. The ink sac is kept intact during cleaning and ruptures during cooking, releasing the dark black ink into the braising sauce. The sauce base is the standard adobo combination: soy sauce (toyo), vinegar (suka), garlic, bay leaves, and black pepper. The final sauce is a very dark, near-black liquid that coats the squid pieces. Adobong pusit is one of the most immediately visually distinctive Filipino dishes because of its intense black colour.
On carpet, adobong pusit is one of the most colour-challenging Filipino food stains. The squid ink contains eumelanin (the same polymer family as human skin and hair pigmentation) — a very stable, dark polymer that is significantly more resistant to oxidative bleaching than soy sauce melanoidin. Three or more hydrogen peroxide rounds are needed for adobong pusit on cream or white carpet.
Component 1: Squid Ink Melanin — Near-Black and H2O2-Resistant
Squid ink consists primarily of eumelanin suspended in a mucopolysaccharide matrix with trace proteins, amino acids, and metals (zinc, copper, iron). Eumelanin is a highly stable polymeric pigment with extensive aromatic ring cross-linking that makes it resistant to oxidative bleaching. On light carpet, squid ink creates a near-black stain. Three rounds of 3% hydrogen peroxide are the standard starting point for adobong pusit on cream or white carpet. A fourth round may be needed on very pale cream or ivory carpet. The melanin responds slowly and progressively to H2O2 — allowing the carpet to fully dry between rounds is more effective than applying rounds in rapid succession on a wet surface.
Component 2: Soy Sauce Melanoidin and Vinegar Acid
The soy sauce in adobong pusit adds its own dark brown melanoidin to the already near-black squid ink sauce. Both respond to hydrogen peroxide — the soy melanoidin clears faster in early H2O2 rounds, while the squid ink melanin requires the later rounds. The vinegar acetic acid is water-soluble and must be fully flushed by two cold water rinse cycles before the H2O2 step (acid reduces H2O2 effectiveness).
Step-by-Step Treatment Sequence
- Collect squid pieces — pick up squid mantle pieces and tentacles before liquid treatment.
- Cold water blot immediately — across the full ink sauce footprint. Cold (squid protein). No rubbing.
- Baking soda round 1 (15 minutes) — squid fat content is low, one round typically sufficient. Vacuum.
- Cold water rinse cycle 1 — vinegar acetic acid, squid ink mucopolysaccharide matrix, dissolved soy sauce. Cold.
- Cold water rinse cycle 2 — second rinse. Acid must be fully flushed before H2O2. Cold.
- Protease enzyme (15 minutes, cold) — squid protein (mantle and tentacle muscle). Blot and cold rinse.
- Dish soap (cold water, blot) — emulsify any residual squid fat. Cold rinse.
- Hydrogen peroxide (3%), round 1 — squid ink melanin + soy melanoidin. 15 minutes. Allow to FULLY DRY before next round. Blot.
- Hydrogen peroxide (3%), round 2 — second round. Allow to fully dry. Blot.
- Hydrogen peroxide (3%), round 3 — three rounds standard for adobong pusit on light carpet. Allow to fully dry. Blot.
- Hydrogen peroxide (3%), round 4 — apply if significant dark colour remains on very pale cream or white carpet after round 3. Blot and dry.
- Baking soda overnight — garlic aroma.
Squid Ink on Carpet vs Other Dark Filipino Food Stains
Ranking the darkest Filipino food stains on light carpet from lightest to most persistent: Mechado (soy + tomato) — two H2O2 rounds. Caldereta with liver paste (haem protein + tomato + soy) — three rounds. Adobong pusit (squid ink melanin + soy) — three to four rounds; the squid ink eumelanin is more stable than liver haem protein because melanin is a crosslinked polymer while haem protein is a metalloporphyrin. Dinuguan (pork blood) — three to four rounds, similar persistence to adobong pusit. The key difference: haem protein stains (blood, liver) respond faster to the first H2O2 round; squid ink melanin responds more slowly but continues to fade over successive rounds.
Adobong Pusit on Your Carpet?
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Frequently asked
My adobong pusit sauce was accidentally overcooked and reduced to an almost-paste consistency — very concentrated in squid ink melanin. The paste fell on cream carpet and sat as a dense dark deposit rather than a spreading liquid. Is overcooked concentrated adobong pusit paste harder to treat?
Overcooked adobong pusit (near-paste, highly concentrated melanin) on carpet: (1) Much higher melanin concentration per unit area — the paste delivers far more squid ink melanin per square centimetre than liquid sauce. The stain is darker and more concentrated but contained to a smaller area. (2) Four to five H2O2 rounds for concentrated paste on cream or white carpet — the standard three rounds may not be sufficient. Apply up to five rounds, allowing full drying between each. The melanin breaks down progressively — do not skip drying time between rounds, as dry surface H2O2 application is more effective than wet-to-wet. (3) Re-hydrate the paste before the cold water blot step — apply a very small amount of cold water (1–2 teaspoons) to the paste zone and allow 60 seconds before blotting. This prevents scraping the dry paste further into the pile. (4) Do not scrape — scraping a concentrated dark paste rubs the pigment into a larger carpet area. Blot from outside inward only. (5) The soy melanoidin in the overcooked sauce also concentrated — soy melanoidin responds faster than squid ink, so early H2O2 rounds clear the soy component while the squid ink responds progressively in later rounds.
The adobong pusit spilled approximately one hour ago — I did not notice until now. The squid ink is now a dried, hardened dark deposit on the cream carpet pile. Does the one-hour delay significantly worsen the outcome?
One-hour-old dried adobong pusit on cream carpet — impact of delay on treatment: (1) Squid ink melanin bonding increases with time — in the first hour, the melanin continues to form covalent and ionic bonds with the carpet fibre surface. After one hour, the surface-accessible melanin has partially bonded to the fibre. The total melanin load has not increased — only the degree of bonding has increased. (2) Re-hydrate before treatment — dried squid ink forms a hardened black deposit. Apply cold water and allow 3–5 minutes re-hydration before blotting. Cold water partially re-suspends the melanin, making it more accessible for subsequent treatment. (3) More H2O2 rounds needed for a one-hour stain — five H2O2 rounds may be needed on cream carpet for a one-hour-old stain (versus three to four for a fresh stain). Allow full drying between rounds and assess after each. (4) Protease enzyme is still effective on dried squid protein — cold water re-hydration followed by protease enzyme (20 minutes) still addresses the dried protein effectively. (5) Accept that partial improvement is the realistic outcome — one-hour-old squid ink melanin on cream carpet may not fully clear even with multiple H2O2 rounds. Professional carpet cleaning with commercial oxidising pre-spray is the escalation after DIY H2O2 reaches its limit.
My adobong pusit was made with cuttlefish (Sepia species, sometimes called "nokos" in Filipino) rather than common squid (Loligo species). Cuttlefish ink is sometimes described as a slightly warmer brown-black versus the cooler blue-black of squid ink. Does cuttlefish ink differ from squid ink in carpet stain persistence?
Cuttlefish ink versus common squid ink on carpet: (1) Both are eumelanin-based polymers — cuttlefish ink (from Sepia species) and common squid ink (from Loligo and others) are both eumelanin suspended in a mucopolysaccharide matrix. The primary pigment chemistry is the same polymer in both cases. (2) The warmer brown-black of cuttlefish ink — this colour variation is due to differences in the eumelanin polymer structure, pheomelanin ratio, and metal ion content of the ink from each species. The Sepia officinalis ink has historically been used as the artist's pigment "sepia" — a warm brown-tinted black. (3) Carpet stain persistence is similar for both — the eumelanin polymer in both inks is the same class of material. The slightly warmer tone of cuttlefish ink may respond marginally faster to hydrogen peroxide, but the practical difference is minor. Three H2O2 rounds remain the starting point for cuttlefish ink adobo on light carpet. (4) The same treatment protocol applies — cold water, baking soda ×1, cold rinse ×2, protease enzyme, dish soap, H2O2 ×3-4, overnight baking soda.
Some of the adobong pusit sauce got on my hands during clean-up and I accidentally transferred handprint stains to other areas of the carpet. The handprint marks are much lighter than the original spill but visible on the light carpet. How do I treat squid ink handprint transfer stains?
Squid ink adobo handprint transfer stains (secondary contact from sauce-covered hands) on carpet: (1) The handprint stains are lighter but have the same chemistry — diluted squid ink transfers the same eumelanin pigment but at much lower concentration (perhaps 5–15% of the original spill density). On light cream carpet, even diluted squid ink handprints may appear as grey-black smudges at each finger or palm contact point. (2) Treat the original spill zone first — the original spill has the highest melanin concentration and is the priority. After the original spill is treated, the diluted handprint zones are treated in the same sequence but need fewer H2O2 rounds (one to two rounds is typically sufficient for diluted transfer stains). (3) Map all handprint transfer zones before applying liquid — the black squid ink shows clearly on light carpet. Identify and note each handprint before applying cold water or liquids. (4) Treat each handprint contact zone separately — cold water blot from outside inward to avoid spreading; treat each as a small independent stain zone after the main spill treatment. (5) Wear gloves for all future squid ink stain treatment — squid ink stains human skin readily and spreads readily on contact. Wash hands immediately with dish soap if stained before touching any other surface.