Heat the oil to 375 degrees.
While the oil is heating up, peel the green plantains and then cut them into 3/4 inch slices.
Fry the slices in the hot oil for 3 minutes. They should be a light golden color and semi-soft.
Remove the plantain slices with a slotted spoon and drain on paper towels. Maintain the oilâ€™s temperature.
When the plantain slices are cool enough to handle (about 1 minute), smash them into flat rounds.
Fry the rounds in the hot oil for 3 minutes. They will turn crisp and golden brown.
Remove the tostones with a slotted spoon and drain on paper towels. Salt to taste.