Oreo recruits Tegan and Sara, plans cookie giveaway

Oreos have been around for more than a century, but the cookies like to keep things fresh by mixing up the flavors from time to time.

Next month Oreo will launch two new tastes: Cookie Dough and Marshmallow Crispy. In an effort to spread the word, it'll hold a giveaway during the Grammys, where the first folks who tweet a "top-secret hashtag" score free cookies.

If you tune in to the awards show Sunday, look for a new ad hyping the sweets. The spot features music from Tegan and Sara, and I have your first listen:

The Oreo folks sent me samples of the new flavors and so, in the name of research, I took a bite. Personally, I prefer the Cookie Dough, which doesn't stray too far from the original. As for the Marshmallow Crispy cookies, they definitely taste marshmallow-y and are sandwiched between vanilla cookies. Mmm.

The limited-edition flavors go on sale in February, and when they're gone, they're gone.