Celiac disease, understood in Spanish.

Picada (Catalan nut-thickening paste) · picada catalana

Picada is a paste of ground almonds, hazelnuts, or pine nuts blended with fried bread and garlic, stirred into Catalan braises, fish stews, and fideuà during the final minutes of cooking. It leaves no visual trace, and because cooks treat it as a finishing technique rather than an ingredient, they may not mention it when asked about nuts.

The nut-and-fried-bread composition and invisible use as a thickener are documented. Because picada is added as a finishing step, ask specifically whether a braise, stew, or fideuà is finished with picada rather than only asking whether the dish 'contains nuts.'

Shared deep fryer in tapas bars · freidora compartida

A single commercial fryer is used continuously for calamares, gambas, croquetas, patatas bravas, boquerones, and churros throughout service. Any item fried after shellfish or breaded fish carries shellfish protein, fish protein, and gluten in the cooking oil.

A shared fryer is standard in Spanish tapas bars and is the primary cross-contamination vector for shellfish, fish, and gluten when ordering otherwise-safe fried items. Legal Nomads flags confirming fryer status as critical for celiacs, and Food Allergy Getaways warns that fried tapas carry seafood cross-contact. Ask whether there is a dedicated fryer.

Croquetas · croquetas de jamón / croquetas de bacalao

Croquetas have a wheat-flour bechamel interior (gluten and dairy), a wheat-breadcrumb exterior, and a standard egg coating before frying. The most common variety is jamón (pork), but bacalao (salt cod) croquettes look identical on the outside, and mixed trays in tapas bars are rarely labeled.

The wheat-flour-and-milk bechamel plus wheat breadcrumb coating is the structural base (FACE / celiacos.org). The jamón filling adds pork; the bacalao version adds fish and is visually indistinguishable from non-fish versions in mixed tapas trays. The exterior egg coating is standard for breaded croquetas.

Ajoblanco (cold almond soup) · ajoblanco / ajo blanco malagueño

Ajoblanco is a chilled Andalusian soup whose primary structural ingredient is ground blanched almonds, blended with stale bread, garlic, and olive oil, served in the same cold-soup format as gazpacho. Travelers familiar with tomato-based gazpacho may not realize this creamy white soup is essentially liquid almonds.

Contains both almonds (primary structural ingredient, not garnish) and stale wheat bread. The visual confusion with gazpacho is a genuine and documented risk.

Salmorejo · salmorejo cordobés

Salmorejo looks like a simple cold tomato soup but its thick, creamy texture comes entirely from blending stale wheat bread into the tomatoes, with bread acting as a structural ingredient rather than a crouton. It is traditionally garnished with chopped jamón serrano.

The jamón garnish is standard per Wikipedia, so the default serving contains pork. Travelers familiar with gazpacho (bread-free, pork-free) are routinely caught off guard by both hidden risks.