Rinse the spinach thoroughly under cold water
Remove any tough stems or damaged leaves
Bring a large pot of water to a boil
Prepare a bowl of ice water
Add the spinach to the boiling water
Blanch for 30 seconds to 1 minute
Remove the spinach with a slotted spoon or strainer
Immediately transfer the spinach to the ice water
Let it cool completely
Drain the spinach well
Squeeze out excess water if needed
Use immediately or store as desired