Peel the raw bananas carefully using a knife. Be cautious as the sap can stick to hands.
Using a mandolin slicer or a sharp knife, slice the bananas into thin, even rounds.
Soak the sliced bananas in water with a pinch of salt for 5-10 minutes to prevent browning.
Heat coconut oil in a deep pan or wok over medium-high heat. The oil should be hot but not smoking.
Carefully drop the soaked banana slices into the hot oil in batches. Fry until golden and crispy.
Remove the fried chips with a slotted spoon and place them on paper towels to drain excess oil.
Sprinkle salt, turmeric, and chili powder (optional) over the chips. Allow them to cool before serving.