Let the ham steak sit at room temperature for 10 minutes before cooking.
Melt butter in a 10-inch skillet over medium heat.
Add the ham steak and cook for 4 minutes without moving it. The underside should be golden brown.
Flip the ham and cook for 3 more minutes.
Transfer the ham to a plate and cover loosely to keep warm.
Lower the heat to medium-low. Add the brown sugar, maple syrup, and Dijon mustard to the same skillet. Stir continuously until the sugar dissolves, about 30 seconds.
Spoon the glaze over the ham and serve immediately.
Video
Notes
Don't skip the sear. Cook the ham without moving it for the first 4 minutes. This is the Maillard reaction, where heat transforms proteins and sugars on the surface into hundreds of new flavor compounds. It's the difference between a flavorful crust and meat that just tastes warmed through.Watch the glaze closely. Brown sugar burns fast. Keep stirring and pull the pan off the heat as soon as the sugar dissolves.Score the edges if the steak curls. Ham steaks sometimes buckle in the pan because the outer ring of fat shrinks faster than the meat. Cut a few small notches into the fat around the edge before cooking and it will lie flat.Use the fond. The browned bits stuck to the pan after searing are concentrated flavor. The glaze ingredients dissolve them into the sauce. Don't wipe or wash the skillet between searing and making the glaze.Freeze ham steaks for later. They keep well in the freezer for up to 3 months. Stock up when they're on sale.