Cut an X in the bottom of each peach.
Bring a pot of water to a boil, and also prepare a large bowl with ice water. When the water comes to a boil, add the peaches and blanch them for 30 seconds-1 minute.
Immediately take the peaches out of the boiling water with a slotted spoon and drop into the ice water to stop the cooking.
The skin will come right off.