( CNN ) -- Denny 's restaurants across North America were jammed Tuesday with patrons hungry to take advantage of the restaurant chain 's Grand Slam breakfast giveaway . Patrons line up early Tuesday outside a Denny 's restaurant in Salt Lake City , Utah . Denny 's announced in a commercial Sunday during the Super Bowl that it would give away its signature breakfast from 6 a.m. until 2 p.m. local time Tuesday at all its restaurants in the U.S. , Canada and Puerto Rico . Media outlets reported customers lined up outside the doors of many of Denny 's 1,500 locations . Some patrons were still wearing their pajamas and slippers , and strangers were crowding together into booths , CNN affiliate KSL-TV in Salt Lake City , Utah , reported . `` You could n't beat it . I mean it was a beautiful , beautiful breakfast . It was fit for a queen or a king , '' diner Annah Shoffner told CNN affiliate WNCN-TV in Raleigh , North Carolina . `` To do this is amazing and not something you hear of every day , especially in today 's economy -- that we 're getting something free , '' Debbie Brugger of Essex Junction , Vermont , anticipating a hearty breakfast at a Denny 's in Burlington , told CNN affiliate WCAX-TV . Watch a Denny 's restaurant jammed with customers » . A college student who identified himself as DeShawn told CNN affiliate KFSN-TV in Fresno , California , that he came out for the free breakfast `` to do better in class -- brain food , you know ? '' A manager at a Denny 's in Raleigh , North Carolina , called the promotion a little `` economic stimulus '' for the average hardworking person , CNN affiliate WTVD-TV reported . `` A lot of restaurants in the community have been going out of business , and we 're aggressively going after the business , '' Eddie Rice , owner of a Denny 's in Peoria , Illinois , told CNN affiliate WEEK-TV . Rice said he had 2,400 eggs ready to cook at the start of the day . Waitress Terri Gibson told CNN affiliate WMFD-TV that her restaurant in Mansfield , Ohio , was busy but everything was going smoothly and no one was complaining . iReport.com : Miami customers line up for Denny 's meal . The company said it was expecting an additional 2 million customers to turn out for the promotion . `` This free offer is our way of reacquainting America with Denny 's real breakfast and with the Denny 's brand , '' Chief Executive Nelson Marchioli said in a statement . The Grand Slam breakfast consists of two pancakes , two eggs , two strips of bacon and two sausage links . It weighs in at 44 grams of fat , 56 carbohydrates and 770 calories , according to CNN affiliate KETV in Omaha , Nebraska . iReport.com : Vouchers run out at Georgia Denny 's . The Grand Slam started as a baseball-related promotion in Atlanta , Georgia , in the mid-1970s and has been served chainwide since 1977 . Its normal price varies by market but averages around $ 5.99 . Denny 's said it sells 12.5 million Grand Slams a year . CNN 's Brad Lendon contributed to this report .
Restaurant chain gives away signature Grand Slam breakfast for eight hours . Patrons line up outside eateries , jam into booths with strangers . Denny 's announced promotion during Super Bowl commercial . Meal of pancakes , eggs , bacon , sausage reportedly packs 770 calories .