Remembering your password is the key to access to your encrypted BitLocker disk drive but keeping the recovery key is also equally important because it is your last chance, last safe guard to you. So, save your Recovery Key before it’s too late.
You can go to BitLocker Drive Encryption in Control Panel to back up your recovery key, if you have lost the original one created during the initial Encryption process.

But you don’t get to see the key directly in the first sight. You will need to look at either the print out or saved file to know what the key is.
Here is a PowerShell way that reveals what the recover key is in one command.
Get-BitLockerVolume
command lists the Encryption status on all the volumes you have on your system.

And here is the command to reveal the BitLocker Recovery Key of BitLocker encrypted drive.
(Get-BitLockerVolume -MountPoint E).KeyProtector
Note that the letter “E” is the driver letter for BitLocker encrypted drive.

That’s it.