Cocochas al Pil-Pil · The Hake-Throat Gelatin Emulsion

A cocochas — kokotxa in Basque — is a small V-shaped piece of flesh from under the chin of the hake (or cod), where the throat meets the jaw. Each piece is about 20-30 g, gelatinous, and mostly pure collagen with a thin membrane of muscle. There are two per fish. Historically the cocochas were bycatch — Basque fishmongers discarded them or gave them to cooks who wanted to work with them; they were too small, too odd-shaped, and too gelatinous for traditional fillet markets. But Basque cooks figured out that those same properties — high collagen, small size, tender — made them the absolute ideal pil-pil ingredient. Cocochas are pil-pil-native in a way that bacalao loin (Batch 8 · this workspace) approaches but never equals.

The physics: where bacalao's gelatin comes from the skin (which the cook has to carefully rest and manage during confit), cocochas are essentially all-gelatin throughout their volume. When you drop 400 g of cocochas into 300 ml of 65°C oil, the gelatin releases almost instantly + in quantity, and the emulsion that forms in the subsequent swirl is roughly 3× thicker and richer than anything bacalao produces. A successful cocochas pil-pil has a sauce with the body of soft whipped cream — visibly clinging to each throat piece, pooling beautifully on the plate, coating the bread that guests will absolutely use to sop the last drops.

The temperature: 65°C (lower than bacalao's 70°C). Two reasons. First, the higher gelatin concentration means faster extraction — you don't need as much heat to release it. Second, cocochas are smaller + more delicate; higher heat would tighten the thin muscle membrane and dry the throat piece. 65°C × 6-7 minutes cooks them perfectly while preserving the silken texture.

A confession: this is a 🔴-only dish. Cocochas are genuinely hard to source outside Spain. La Tienda in Virginia air-ships frozen Spanish cocochas in small packs; Marky's Aventura occasionally has them; fresh cocochas require a direct line to a Spanish-import fishmonger. There is no American equivalent that works — cod throats (sometimes sold as 'cheeks') are a reasonable stand-in but 30% less gelatinous + slightly different texture. For this dish, either you have access to cocochas or you don't. When you do, make it. When you don't, bacalao al pil-pil (Batch 8) is the alternative that teaches the same lesson at accessible ingredient cost.