Cuts

Knife Cuts — Regional & Global

Plantain — Green Coin, Diagonal & Lengthwise Cuts

Also: tostones cut, patacones cut, maduros cut, alloco cut

Three distinct knife cuts of the plantain, each matched to ripeness stage and culinary destination — thick coins for tostones, angled slices for West African frying, lengthwise strips for sweet maduros.

Plantains (Musa × paradisiaca) are cooked at three ripeness stages — green (starchy), yellow-ripe (semi-sweet), and black-ripe (sweet) — each demanding a different cut geometry. The thick transverse coin (1.5–2.5 cm rounds) is used for green plantain tostones where the slice will be smashed and double-fried. The diagonal or bias cut (1–2 cm oblique rounds, up to 45° angle) is common in West and Central African preparations and some Caribbean styles, producing an elongated oval slice with more surface area for caramelization. The lengthwise split or plank (2–4 mm thick, running the full length of the fruit) is used for ripe-to-overripe maduros and Caribbean baked plantains where the natural curvature and sweetness are showcased.

In photos

Plantain — Green Coin, Diagonal & Lengthwise Cuts in its raw whole-cut form on a butcher's board — Plantains (Musa × paradisiaca) are cooked at three ripeness stages — green (starchy), yellow-ripe (semi-sweet), and black-ripe (sweet) — each demanding a different cut geometry. Identifying traits: Green plantain is dense enough to hold its shape through double frying and smashing, Diagonal cut maximizes crust-to-flesh ratio on semi-ripe plantain, Lengthwise plank caramelizes evenly across the cut face on ripe or black plantain.
Plantain — Green Coin, Diagonal & Lengthwise Cuts in its raw whole-cut form on a butcher's board — Plantains (Musa × paradisiaca) are cooked at three ripeness stages — green (starchy), yellow-ripe (semi-sweet), and black-ripe (sweet) — each demanding a different cut geometry. Identifying traits: Green plantain is dense enough to hold its shape through double frying and smashing, Diagonal cut maximizes crust-to-flesh ratio on semi-ripe plantain, Lengthwise plank caramelizes evenly across the cut face on ripe or black plantain.
Where the plantain — green coin, diagonal & lengthwise cuts lives on the source. The cultivated starchy fruit of Musa × paradisiaca.
Where the plantain — green coin, diagonal & lengthwise cuts lives on the source. The cultivated starchy fruit of Musa × paradisiaca.
Plantain — Green Coin, Diagonal & Lengthwise Cuts prepared the canonical way — Tostones (Puerto Rican double-fried green plantain). Thick coin for tostones: score the green skin lengthwise with a knife tip and peel in strips (don't peel like a banana — the skin is tough). Cut into 1.5–2.5 cm transverse rounds.
Plantain — Green Coin, Diagonal & Lengthwise Cuts prepared the canonical way — Tostones (Puerto Rican double-fried green plantain). Thick coin for tostones: score the green skin lengthwise with a knife tip and peel in strips (don't peel like a banana — the skin is tough). Cut into 1.5–2.5 cm transverse rounds.

Where it comes from

The cultivated starchy fruit of Musa × paradisiaca; botanically a berry. Grown across tropical Africa, the Caribbean, Central and South America, and Southeast Asia. Unlike dessert bananas, plantains are almost always cooked before eating.

Green plantain is dense enough to hold its shape through double frying and smashingDiagonal cut maximizes crust-to-flesh ratio on semi-ripe plantainLengthwise plank caramelizes evenly across the cut face on ripe or black plantainGreen plantain starch resists oil absorption better than ripe — exterior crisps without greasingRipe lengthwise cuts develop a lacquered, deeply caramelized crust in high heat

Best for

Thick coin (green): tostones (Puerto Rico, Cuba, Dominican Republic), patacones (Colombia, Ecuador)Thick coin (green): soup and stew thickener when left whole and simmeredDiagonal cut (semi-ripe): West African alloco (Côte d'Ivoire), kelewele (Ghana, spiced fried plantain)Diagonal cut: Congolese and Cameroonian plantain fryLengthwise plank (ripe/black): maduros (Cuba, Puerto Rico), platanos al horno (baked sweet plantain)Lengthwise plank (ripe): Ugandan rolex filling, East African accompaniment to beans and rice

How to cook it

  1. 1Thick coin for tostones: score the green skin lengthwise with a knife tip and peel in strips (don't peel like a banana — the skin is tough). Cut into 1.5–2.5 cm transverse rounds.
  2. 2First fry the coins in 180°C (350°F) oil for 3–4 minutes until pale gold but not cooked through. Drain.
  3. 3Smash each coin flat with a tostonera, the bottom of a glass, or a folded piece of parchment to about 6 mm thickness. Return to 190°C (375°F) oil for 2–3 minutes until golden and crisp.
  4. 4Diagonal cut for West African style: peel a yellow-ripe plantain and cut at a 30–45° angle to the long axis, producing oval slices 1–2 cm thick.
  5. 5Season diagonal slices (salt, cayenne, ginger for kelewele) and shallow-fry in vegetable oil at 175°C (345°F) for 2–3 minutes per side until amber and caramelized.
  6. 6Lengthwise plank for maduros: peel a black or fully ripe plantain and halve lengthwise. Each half can be left whole or split again into thinner planks.
  7. 7Pan-fry lengthwise planks in oil or butter over medium heat, 2–3 minutes per side, until deeply bronzed and sticky with released sugars. Alternatively roast at 200°C (400°F) for 15–20 minutes.

Prep & butchery

  • Green plantains are difficult to peel; score the skin with three lengthwise cuts and soak in salted water for 5 minutes to loosen before peeling.
  • A mandoline can cut thin, uniform lengthwise planks for crispy maduros chips, though most traditional recipes use a simple chef's knife.
  • Dry cut pieces with a paper towel before frying — surface moisture causes splattering and inhibits crisping.
  • The ends of a plantain cook faster than the center; for diagonal cuts, make end slices slightly thicker to equalize cooking.

Substitutes

  • Green banana (for tostones)

    Similar starch content; slightly more bitter, but smashes and double-fries well.

  • Cassava (for thick coin)

    Starchy root can be sliced and fried to similar effect; different flavor profile.

  • Sweet potato lengthwise plank (for maduros)

    Comparable caramelization and sweetness; lacks the plantain's distinctive flavor.

Related cuts

  • Yuca (cassava) — thick coin

    Analogous starchy fry cut for a similar tropical root.

  • Sweet potato — lengthwise plank

    Same geometry for baked or fried sweet preparations.

  • Transverse round (general)

    The coin cut's parent technique; applies across cucumbers, carrots, and tubers.

Appears in

Tostones (Puerto Rican double-fried green plantain)Patacones (Colombian/Ecuadorian smashed plantain)Kelewele (Ghanaian spiced fried plantain)Alloco (Ivoirian fried plantain)Maduros (Cuban/Puerto Rican sweet fried plantain)Sancocho (Caribbean stew with thick plantain coins)Platanos al horno (baked ripe plantain)

References

  1. 1.Afro-Vegan: Farm-Fresh African, Caribbean & Southern Flavors Remixed — Bryant Terry
  2. 2.Gran Cocina Latina: The Food of Latin America — Maricel Presilla
  3. 3.The Complete Caribbean Cookbook — Dunstan Harris
  4. 4.The Africa Cookbook: Tastes of a Continent — Jessica B. Harris

Confidence: high

Notes

Why ripeness dictates cut

Starch-to-sugar conversion transforms the plantain as it ripens. A green plantain is roughly 70% starch with negligible free sugars, making it structurally suited for the coin cut — it holds together under pressure for smashing and absorbs minimal oil. By the black stage, free sugars exceed 15% of dry weight, and the fruit is so soft that lengthwise planks must be handled gently; the high sugar content is precisely what produces the mahogany caramelization that defines maduros.

Regional cutting traditions

The diagonal cut's prevalence across West and Central Africa likely reflects both aesthetic preference (the larger oval face presents well) and practical reality: semi-ripe plantains at the yellow-turning stage are the most common market offering in many urban West African contexts. The thick coin and lengthwise plank reflect Caribbean culinary development where both ends of the ripeness spectrum are deliberately cultivated for distinct dishes.