Good news avid fast food eaters! McDonald's is finally offering its all-day breakfast menu starting Tuesday. The big changes in offering breakfast all-day long is part of the bold plans to boost the chain's stagnant sales as established by new McDonald's CEO Steve Easterbrook.

McDonald's all-day breakfast menu, however, varies by location. In fact, ABC News listed what you can and can't order in McDonald's. In most branches, customers can order sausage burrito, "Fruit 'N Yogurt" parfait, "Fruit & Maple" oatmeal, hash browns, hotcakes and hotcakes with sausage.

"It's something our customers have been asking for for years, believe it or not," McDonald's regional marketing manager Amy Schillinger said, as per CBS Pittsburg.

Just a month ago, McDonald's Corp. announced its plans to serve cage-free eggs in their 16,000 restaurants in the United States and Canada by 2025. The world's largest fast food chain's announcement came after it unveiled its two-year plan in March to phase out poultry products taken from chickens living in caged conditions, which are usually raised with antibiotics to fight human infections.

Since by October, McDonald's will introduce their all-day breakfast menu in its U.S. branches, which will lead to the consumption of about 2 billion eggs in the U.S. and 120 million for Canada, the company decided to switch to antibiotic-free chickens, grass-fed beef and cage-free eggs. The move also aims to restore the company's decreasing sales, as previously reported.

Meanwhile, McDonald's all-day breakfast is not as easy as what customers think. According to CNN Money, more than 14,300 U.S. branches needed to install separate griddles and train staff on how to handle breakfast orders simultaneously with lunch and dinner. Thus, some customers worry that the move might affect McDonald's service.

As McDonald's seek to serve all kinds of customers and their needs, some worry service will slow down as workers struggle to prepare all-day breakfast and burger and fries. And McDonalds acknowledges some franchises have to adjust.

"It will be, just due to the size of our grill space, but again as I mentioned we went through all the testing to make sure we can deliver that without a disruption to your service," Schillinger said.