Bring large pot of salted water to boil and add green beans when the water begins boiling. Cook green beans for 5-7 minutes. Do not overcook. You want them to be a nice bright green color.
While beans are cooking, prepare an ice water bath: In a large bowl, add ice, cold water, and salt. Stir to mix in the salt.
Drain beans and immediately put them into the ice water bath to stop them from continuing to cook.