Puerto Rican cuisine is built on sofrito — a raw aromatic paste of ají dulce (sweet peppers), recao (culantro), cilantro, onion, garlic, and sometimes tomato and bell pepper, blended and stored as a ready-to-use flavour base. Unlike Italian soffritto (cooked) or Spanish sofrito (cooked in oil), Puerto Rican sofrito is prepared RAW, stored in the fridge or freezer, and cooked into dishes at the start of preparation. Recaíto is the green version without tomato. This paste is the foundation of virtually every Puerto Rican dish — arroz con gandules, pernil, habichuelas guisadas.
Ají dulce peppers are essential and NOT substitutable with bell peppers — they have a unique sweet, slightly smoky flavour without heat. Recao (culantro/long coriander) provides a flavour similar to cilantro but deeper and more pungent — it's the signature herb. The paste is blended raw to a coarse texture, not puréed smooth. A batch keeps refrigerated for a week or frozen in ice cube trays for months. When cooking: heat oil or rendered pork fat (manteca) in the pot, add sofrito, cook until fragrant and liquid reduces — this is the base for everything. Sazón (a seasoned salt blend, often with annatto for colour) is the partner seasoning.
Make a large batch and freeze in ice cube trays — one cube per dish. The combination of sofrito fried in rendered pork fat is the flavour DNA of Puerto Rican cooking. For arroz con gandules: fry sofrito in oil with ham or salt pork, add pigeon peas, rice, stock, olives, capers — cook covered until rice absorbs liquid and the bottom develops a crispy crust called pegao (the Puerto Rican equivalent of tahdig or socarrat). Illyanna Maisonet's Diasporican is the authoritative English-language reference for these techniques.
Substituting bell pepper for ají dulce — fundamentally different flavour. Using cilantro alone without recao — you lose the distinctive Puerto Rican flavour. Blending too smooth — the paste should have texture. Cooking the sofrito raw into food without frying it in fat first — the fat extraction step is essential. Using commercial sazón without understanding it's primarily salt and annatto — adjust other salt accordingly.