Cut each piece of ham in half. Each half will be a serving.
Heat a large, 12-inch skillet over medium heat. Add the butter. Once the butter melts, swirl it to coat the bottom of the skillet.
When the butter starts foaming, add the ham in a single layer. Sprinkle the ham with garlic powder, dried thyme, and cayenne pepper.
Cook until browned on the bottom, about 3 minutes.
Add the maple syrup to the skillet and swirl to combine with the pan juices. Turn the ham to the other side and cook until browned on that side, about 2 more minutes.
Transfer the ham to plates. Drizzle or brush it with the pan juices. Serve immediately.
Video
Notes
Since ham is very salty, there's no need to add salt.
The sodium content will depend on the brand of ham you use.
While you could theoretically add the maple syrup at the start of the cooking process, right after the butter has melted, it's better to add it right before you flip the ham. If you add it at the start, it will caramelize too much by the time the ham is ready and could even start to slightly burn. So it's best to add it midway through cooking.
You can keep the leftovers in an airtight container in the fridge for up to five days. Reheat them in the microwave, covered, at 50% power.