Set a cookie value in Node.js
As Express is built on Connect, you can use the cookieParser middleware and req.cookies to read and res.cookie() to write cookies:
// configurationapp.use(express.cookieParser());// or `express.cookieParser('secret')` for signed cookies// routingapp.get('/foo', function (req, res) { res.cookie('bar', 'baz'); // ...});app.get('/bar', function (req, res) { res.send(req.cookies.bar);});[Update]
As of Express 4.0, Connect will no longer be included with Express and the default middleware have been moved into their own packages, including cookie-parser.
You could just use the response object that express provides to set your cookies.
You can find detailed information on how to do that at: http://expressjs.com/en/api.html#res.cookie