MVC application gets bearer token from Web API. How to convert this to cookie so this can be used by MVC application authorisation?

Hi, 
I have a Web API application. This issues bearer tokens for authorization. However, I want to send the client a cookie so this can be used for authorization. How do I send the client a bearer token and a cookie for authorization in one request? So for AJAX calls I can include the bearer token and postbacks it sends the cookie. 
Any help would be really appreciated. 
Best regards, 
     Seamus