Wash green beans thoroughly
Trim the ends
Cut into desired lengths if needed
Bring a large pot of water to a boil
Prepare a large bowl of ice water
Add green beans to the boiling water
Blanch for 2 to 3 minutes
Drain the green beans immediately
Transfer them to the ice water
Cool for 2 to 3 minutes
Drain well
Pat dry completely
Spread in a single layer on a baking sheet
Freeze until firm
Transfer to freezer bags or airtight containers
Remove as much air as possible
Label with the date
Store in the freezer