Try this Instant Pot Charros recipe, or contribute your own.
Standard baked beans rely on molasses and slow-simmered pork, whereas charro beans draw their backbone from rendered pork fat, cured sausage, and beer. Frying raw chorizo and double-smoked bacon directly in the cooker renders animal fats that coat the dry pinto beans, sealing their starches and preventing blowouts during pressure cooking. Aromatics like garlic, cumin, and Mexican oregano bloom in this residual fat, driving fat-soluble flavor compounds into every bean.
Combining acidic canned tomatoes with dry legumes increases cooking times because acid strengthens pectin in plant cell walls. Retaining those tomatoes from the start builds a deeply savory broth despite the extended pressure duration.