There are a few things to keep in mind when cooking hamburger for your cat. First, make sure the hamburger is lean - too much fat can be unhealthy for cats. Second, cook the hamburger until it's well done - undercooked meat can be dangerous for cats (and humans!) Third, chop or grind the hamburger into small pieces so that your cat can eat it easily.
Now that you know those basics, let's get cooking! Start by browning the hamburger in a skillet over medium heat. Once it's browned, add some water (or chicken broth) to the pan and continue cooking until the meat is cooked through. Then, remove from heat and chop or grind into small pieces.
Serve your cat's hamburger with some kibble or wet food, or on its own as a treat. And enjoy knowing that you've made a delicious and healthy meal for your feline friend!