Dominican Mangú
Green plantains become silky when mashed while piping hot with butter and their own starchy cooking water, then finished with vinegar-bright red onions.
About this dish
Mangú is a Dominican preparation of boiled green plantains mashed while hot until smooth and supple. It is strongly associated with breakfast and is often served with sautéed red onions; the full plate called los tres golpes adds fried egg, Dominican salami and frying cheese.
This recipe focuses on the mash and onions so they can be served as a side or used as the foundation for that larger breakfast.
Why this dish matters
Mangú is everyday food with national visibility: Dominican culinary sources describe it as one of the country's most emblematic breakfasts. Its appeal depends less on a long ingredient list than on timing. Plantain starch firms as it cools, so the cook reserves hot cooking water and mashes immediately.
The onion topping is not decorative. Vinegar and the onion's slight bite cut through the dense, buttery plantain; spoon some of the warm pickling liquid over each serving.
Households differ on butter versus oil, the amount of cooking water and how smooth the mash should be. Serve the accompaniments your table prefers.
Preparation notes
They should feel firm and show little or no yellow; ripe plantains make a sweeter, looser mash.
Plantain sap is sticky. A little oil on the knife and hands makes peeling easier.
Reserve more water than you expect—the mash tightens quickly as it stands.
Ingredients & detailed method
Ingredients
- 4 large green plantains
- 2 teaspoons fine salt, divided
- 4 tablespoons unsalted butter, at room temperature
- 3/4 cup hot plantain cooking water, plus more as needed
- 1 large red onion, thinly sliced into rings or half-moons
- 1/4 cup white or apple-cider vinegar
- 2 tablespoons olive oil
Method
- 1.Combine the sliced onion, vinegar and 1/2 teaspoon salt in a bowl. Toss well and leave to soften while the plantains cook.
- 2.Trim the plantain ends. Score each peel lengthwise without cutting deeply into the flesh, then pry away the thick peel. Cut each plantain crosswise into 3 pieces.
- 3.Place the plantains in a saucepan and cover with cool water by 1 inch. Add 1 teaspoon salt, bring to a boil, then lower to a steady simmer.
- 4.Cook for 20–25 minutes, until a knife slides through the center with almost no resistance. Undercooked plantain produces a dry, lumpy mash.
- 5.Before draining, scoop out at least 1 cup of the hot cooking water. Drain the plantains and return them immediately to the warm saucepan.
- 6.Add the butter and mash while the plantains are steaming hot. Pour in 1/2 cup reserved water gradually, continuing to mash until no dry pieces remain.
- 7.Checkpoint: the mangú should look creamy and fall softly from the masher, not hold a crumbly mound. Add more hot cooking water 1–2 tablespoons at a time; it will firm as it cools.
- 8.Heat the olive oil in a small skillet over medium. Add the onions with their vinegar and cook for 3–5 minutes, just until bright pink and flexible but not browned.
- 9.Taste the mangú and add the remaining salt as needed. Spoon onto warm plates and top with the onions and some of their sharp cooking juices.
- 10.Serve immediately on its own or with fried eggs, Dominican salami and frying cheese for los tres golpes.