Chef Margarida
Bifana
Alentejo's gift to late nights and hungry workers: thin pork bathed in garlic and white wine, stuffed into a crusty roll. Mustard or piri-piri, that's the only question.
Culinary Explorer
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Prego em Bolo do Caco
Created by
The steak sandwich of Madeira, where garlic-soaked beef meets the island's legendary sweet potato flatbread. Prego means 'nail it to the grill.' That's exactly what you do.
Sandwiches & Wraps
Portuguese
Comfort Food
Special Occasion
45 min
Active Time
30 min cook•1 hr 15 min total
Yield4 sandwiches
Ididn't grow up with bolo do caco. That's a Madeiran thing, and my roots are Alentejo. But the first time I tasted prego em bolo do caco in Funchal, standing at a kiosk near the Mercado dos Lavradores with grease running down my wrist, I understood why the Madeirans guard this recipe so fiercely.
The bread is everything. Bolo do caco isn't quite bread, isn't quite flatbread, isn't quite anything you've had before. Sweet potato in the dough gives it that slight sweetness, that tender crumb that tears instead of crumbles. Traditionally it's cooked on a caco, a flat basalt stone heated over wood fire. You can smell them cooking from streets away.
The prego itself is simple. Thin beef, pounded tender, marinated in garlic and wine and bay leaf. Seared hard and fast until the edges char but the center stays pink. Then it goes straight into the bolo do caco that's been split and slathered with garlic butter. The butter melts. The meat juices soak into the bread. You eat it standing up because sitting down would waste precious seconds.
At Mesa da Avó, I've served this as a late-night dish, after the main courses, when everyone's had wine and the formality has melted away. People fight over who gets to make the next one. This is what Portuguese street food is supposed to be: fast, satisfying, and absolutely non-negotiable in its simplicity.
Bolo do caco arrived in Madeira with the island's agricultural transformation after Portuguese settlement in the 15th century. The sweet potato, brought from the Americas, became a staple crop in Madeira's volcanic soil and found its way into the flatbread that was already being made on heated stones. The name 'caco' refers to the basalt cooking stone, a tradition with Moorish roots that spread throughout the Portuguese Atlantic islands.
The technique, the tradition, and the story behind every dish.
Discover Culinary ExplorerIngredients
sweet potato
Quantity
300g (about 1 medium)
peeled and cubed
all-purpose flour
Quantity
500g, plus more for dusting
instant yeast
Quantity
7g (1 packet)
salt
Quantity
1 teaspoon
sugar
Quantity
1 teaspoon
warm water
Quantity
100ml
beef steaks (rump or sirloin)
Quantity
4 (about 150g each)
pounded to 1cm thick
garlic
Quantity
6 cloves
minced
dry white wine
Quantity
100ml
bay leaves
Quantity
2
extra virgin olive oil
Quantity
2 tablespoons
sea salt
Quantity
1 teaspoon
black pepper
Quantity
freshly ground, to taste
unsalted butter
Quantity
100g
softened
garlic for butter
Quantity
4 cloves
finely minced
fresh parsley
Quantity
2 tablespoons
finely chopped
salt for butter
Quantity
pinch
| Ingredient | Quantity |
|---|---|
| sweet potatopeeled and cubed | 300g (about 1 medium) |
| all-purpose flour | 500g, plus more for dusting |
| instant yeast | 7g (1 packet) |
| salt | 1 teaspoon |
| sugar | 1 teaspoon |
| warm water | 100ml |
| beef steaks (rump or sirloin)pounded to 1cm thick | 4 (about 150g each) |
| garlicminced | 6 cloves |
| dry white wine | 100ml |
| bay leaves | 2 |
| extra virgin olive oil | 2 tablespoons |
| sea salt | 1 teaspoon |
| black pepper | freshly ground, to taste |
| unsalted buttersoftened | 100g |
| garlic for butterfinely minced | 4 cloves |
| fresh parsleyfinely chopped | 2 tablespoons |
| salt for butter | pinch |
Equipment Needed
- •Large cast iron skillet or griddle for the bread
- •Heavy skillet or grill pan for the steaks
- •Meat mallet or rolling pin for pounding
Instructions
- 1
Cook the sweet potato
Boil the sweet potato cubes in salted water until completely tender, about 15 minutes. Drain well and mash while still hot until completely smooth. No lumps. The sweet potato needs to disappear into the dough. Let it cool to warm, not hot.
The sweet potato must be truly smooth. Any lumps will show in the final bread. Pass it through a ricer if you have one. - 2
Make the dough
In a large bowl, combine the flour, yeast, salt, and sugar. Add the warm mashed sweet potato and the warm water. Mix until a shaggy dough forms, then turn out onto a floured surface and knead for 8 to 10 minutes until smooth and elastic. The dough should be soft but not sticky. Add flour sparingly if needed. Shape into a ball, place in an oiled bowl, cover with a damp cloth, and let rise in a warm spot for 1 hour until doubled.
- 3
Marinate the beef
While the dough rises, prepare the prego. Place the pounded steaks in a shallow dish. Scatter the minced garlic over them, add the bay leaves, pour the wine and olive oil over everything. Season with salt and pepper. Turn the steaks to coat. Cover and let marinate at room temperature for at least 30 minutes, or refrigerate for up to 4 hours.
Pound the steaks thin and even. Thick steaks won't cook fast enough and you'll lose that charred exterior with pink center that makes a proper prego. - 4
Make the garlic butter
Combine the softened butter with the minced garlic, parsley, and a pinch of salt. Mix until everything is evenly distributed. This is what transforms good into extraordinary. Set aside at room temperature.
- 5
Shape and cook the bolo do caco
Divide the risen dough into 4 equal pieces. Shape each into a ball, then flatten into discs about 15cm across and 1.5cm thick. Heat a large cast iron skillet or griddle over medium heat. No oil. Cook each bolo for 4 to 5 minutes per side until golden brown spots appear and the bread sounds hollow when tapped. The surface should have that characteristic mottled look. Keep warm wrapped in a clean cloth.
A dry pan is essential. The bread should develop those dark spots from direct contact with hot iron. In Madeira, they use basalt stones. Cast iron is the next best thing. - 6
Sear the steaks
Heat a heavy skillet or grill pan over high heat until smoking. Remove the steaks from the marinade and shake off excess. Sear for 1 to 2 minutes per side for medium-rare, depending on thickness. The edges should char while the center stays pink. Remove and rest for 1 minute only. You want these juices going into the bread, not onto a cutting board.
- 7
Assemble and serve
Split each bolo do caco horizontally. Don't cut all the way through. Spread the garlic butter generously on both cut sides. The residual heat will melt it immediately. Place a steak inside, close the bread, press down gently. The butter melts, the meat juices soak in, and everything becomes one. Serve immediately. This is not a sandwich that waits. Eat it standing up if you have to. That's how it's done in Funchal.
Chef Tips
- •The steaks must be thin. Ask your butcher to pound them, or do it yourself between sheets of plastic wrap. Thick steaks don't work here. The whole point is fast, fierce heat.
- •If you can't find sweet potatoes, some Madeiran versions use regular potatoes, but the bread won't have that subtle sweetness that makes bolo do caco special.
- •The garlic butter is non-negotiable. I've seen people skip it to be 'healthy.' Don't. The butter is what makes the sandwich.
- •In Madeira, they often add a fried egg on top of the steak. It's not traditional everywhere, but if you want to try it, I won't stop you. Let the yolk run into the bread.
Advance Preparation
- •The dough can be made ahead and refrigerated overnight. Bring to room temperature for 30 minutes before shaping.
- •The garlic butter keeps refrigerated for 1 week. Bring to room temperature before using.
- •The steaks can marinate for up to 4 hours refrigerated, but bring to room temperature for 20 minutes before cooking.
- •The bolo do caco is best fresh but can be made a few hours ahead and rewarmed briefly in a dry pan.
Frequently Asked Questions
Nutrition Information
1 serving (about 350g)
Calories
1180 calories
Total Fat
51 g
Saturated Fat
23 g
Trans Fat
0 g
Unsaturated Fat
27 g
Cholesterol
160 mg
Sodium
1200 mg
Total Carbohydrates
114 g
Dietary Fiber
6 g
Sugars
4 g
Protein
53 g
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