Je te renvois vers la doc, c'est assez explicite ..
Retrieving Cookies From Requests
All cookies created by the Laravel framework are encrypted and signed with an authentication code, meaning they will be considered invalid if they have been changed by the client. To retrieve a cookie value from the request, use the cookie method on a Illuminate\Http\Request instance:
Attaching Cookies To Responses
You may attach a cookie to an outgoing Illuminate\Http\Response instance using the cookie method. You should pass the name, value, and number of minutes the cookie should be considered valid to this method:
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