So, here's the deal. Frozen ground beef can be just as safe as fresh ground beef, as long as you handle it properly. But, it's gonna take a bit longer to cook, since it's, well, frozen solid.
I found out that the USDA recommends cooking frozen ground beef to an internal temperature of at least 160°F (71°C). That's to make sure any bacteria get killed off. And, let's be real, who wants to eat a burger that's gonna make them sick?
One fun fact I stumbled upon: you can actually cook frozen ground beef in the microwave. Yeah, I know, it sounds weird, but hear me out. You just gotta make sure you're using a microwave-safe dish, and you're cooking it in short bursts, flipping it halfway through.
Cooking Frozen Ground Venison at Abby Choi blog