Pat pork ribeye steaks dry with paper towels and season thoroughly with salt, pepper, and garlic powder.
Heat olive oil in a heavy cast iron skillet over medium-high heat until shimmering.
Add pork steaks and sear undisturbed for 5 minutes until deep golden crust forms.
Flip steaks, add butter, crushed garlic cloves, and rosemary sprigs to pan.
Spoon melted foaming butter over steaks for 4 minutes until meat thermometer reads 145 degrees.
Transfer steaks to a warm board and rest for 5 minutes before slicing.