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Duros de Harina

Name: Duros de Harina
Prep time: 5 min
Cook time: 10 min
Total time: 15 min
Cuisine: Mexican
Ingredients: 1 tsp Ground chile piquín; Salt; 2 Lime; 200 g Raw duros de harina (dried wheat snacks); 4 tbsp Valentina or Búfalo hot sauce; 500 ml Vegetable oil

15 min (5 prep + 10 cook) Easy 4 servings Nacional

Edmond Bojalil

Recetas Mexas

Published: 26 Mar 2026 · Updated: 16 Apr 2026

Puffed and fried wheat wheels with hot sauce, lime and chilli.

About this recipe

Duros de harina are puffed wheat wheels, one of Mexico's most popular street snacks. They are bought dry and fried in hot oil until they puff up spectacularly in seconds, transforming into crispy golden balloons. They are served in bags with Valentina or Búfalo hot sauce, lime juice, salt and chile piquín. The home-made version allows you to control the heat level and the freshness of the oil, delivering a result superior to street stalls.

History & Origin

Duros de harina are a twentieth-century Mexican industrial invention, originally sold as a dry snack in small plastic bags under the name 'duros' or 'chicharrones de harina'. They are made by extruding wheat dough with bicarbonate of soda, forming small ridged wheels that are then completely dried. When they come into contact with oil at high temperature, the moisture trapped inside instantly turns to steam, puffing the piece to three or four times its original size. This physical phenomenon fascinates children and adults alike. Although they are a modern industrial product, they quickly became embedded in Mexican street culture and are now inseparable from the parks, fairs and markets across the country. They are eaten mainly as a snack, dressed with the ever-present Valentina hot sauce and a generous squeeze of lime. They are particularly popular with children, who buy them at school gates.

Estimated cost

£2.50

Total cost

£0.63

Per serving

* Approximate prices based on UK supermarkets

Nutritional information per serving

450

Calories

Protein

40g

Carbohydrates

30g

Fat

Fibre

500mg

Sodium

* Approximate values. May vary depending on ingredients used.

Method

1
Heat the oil in a wok or deep frying pan over high heat until it reaches 190°C. To test the temperature, drop in one duro: if it puffs immediately, the oil is ready.
💡 The oil must be very hot, otherwise the duros will be greasy and won't puff properly.
2
Add the duros in small batches (4–6 pieces) so as not to lower the oil temperature. Watch as they puff up spectacularly in 5–10 seconds.
💡 Keep a slotted spoon ready to turn them if needed.
3
When they are fully puffed and golden, remove them with a slotted spoon and drain on kitchen paper.
4
Place them in a large plastic bag. Add Valentina hot sauce, lime juice, salt and chile piquín. Close the bag and shake gently so everything is coated.
💡 The bag is the authentic street method: it ensures the dressing reaches every piece.
5
Serve immediately while they are hot and crunchy.