It’s game on for National Grilled Cheese Month. Dairy brands and associations are taking to the web and using social media to promote grilled cheese sandwiches. Not surprisingly, the event has its own hashtag: #NationalGrilledCheeseMonth.

The American Butter Institute, Arlington, Va., posts photos and recipes on its Go Bold With Butter website.

The Wisconsin Milk Marketing Board invites consumers to enter its “Grilled Cheese Recipe Showdown” and offers a top prize of $15,000 plus a basket of assorted cheeses from the state.

Just how popular are grilled cheese sandwiches? Arla Foods Brand Manager Liberty Sveke told Dairy Foods that they are the most-pinned foods on Pinterest.

To capitalize on this interest, Arla has enlisted bloggers, a bread company and food trucks to spread the word about its Dofino brand of Havarti and Gouda cheeses made in Kaukauna, Wis. The cheesemaker is inviting consumers to a Twitter chat on Wed. April 8 from 8 to 9 p.m. EDT. Bloggers from FoodieCrush.com and TwoPeasAndTheirPod.com and Eureka! Organic Bread will talk about their favorite recipes and share tips for making the perfect sandwich. Follow the conversation using the hashtag #GooeyGoodness.

Based in Basking Ridge, N.J., Arla Foods is a unit of the European dairy cooperative, the fifth largest in the world.

See our photo gallery, “4 mouth-watering grilled cheese sandwiches you have to make in April, National Grilled Cheese Month,” for photos and recipes by FoodieCrush.com and TwoPeasAndTheirPod.com.

In addition to its participating in National Grilled Cheese Month, Arla will be undertaking a back-to-school campaign in August and September, Sveke said, to promote cheese sandwiches in school lunchboxes. Listen to Dairy Foods' interview with Sveke in this All Things Dairy podcast.