Maduros

Plantains (Musa × paradisiaca) arrived in the Caribbean from West Africa via the Atlantic slave trade in the 16th–17th centuries, where they replaced the Old World sweet banana for cooking. Maduros developed across the Spanish Caribbean — Cuba, Puerto Rico, Dominican Republic — as the ripe-fruit counterpart to tostones (made from green plantain). The dish is purely a frying technique applied to fruit at peak sugar conversion.

Sub-Saharan plantain crossed the Atlantic in the 16th–17th centuries, then doubled back as fryer fruit across Cuba, Puerto Rico, and the DR. Skin must be black with yellow only at the stem — at that stage roughly 80% of the starch has converted to fructose and glucose. Oil at 175°C; hotter and the sugars burn before the inside softens.

Slices of overripe plantain — skin nearly black — fried in shallow oil until the edges caramelize to mahogany and the centers turn nearly jammy. Sweet, with a faint tang from the fruit itself. Served as a side to almost everything Cuban: black beans and rice, roast pork, picadillo. No sugar added; the sweetness is all from the fruit's converted starch.

Ripeness is non-negotiable: skin must be black with yellow only at the stem. At that stage the starch has largely converted to fructose and glucose, and the slices will caramelize; underripe and you get bland, starchy maduros that won't brown. Crucially, maduros are pan-fried over medium to medium-low heat, not deep-fried — let the sugars color slowly while the inside softens. Too hot and the sugars scorch before the center is done; the often-cited 175°C / 350°F is the deep-fry temperature for green-plantain tostones, not for maduros. Cook in batches; crowding the pan drops the temp and the slices steam into mush instead of browning.