That's because a recent study found that lots of popular takeaways were high in fat, and in particular saturated fat.
Eating too much saturated fat can cause problems for your heart and can make you become overweight.
After making the burgers with Vinnie, Ethan told Newsround: "Looking at them now they're really shaped like a hamburger - I love it, they're good! I've never made anything like this before. I want to do it again."
And Tyler, who made the wedges with Louis said: "It's really exciting because he's my idol - I really look up to him, it's really cool to cook with him."