Rinse your salmon filets and pat ‘em dry with paper towels.
Mix salt, black pepper, garlic powder, and lemon zest in a small bowl.
Rub the mixture all over the flesh side of the salmon filets.
Heat a cast iron skillet over medium-high heat and add olive oil.
Add salmon skin-side down. Cook for 3-4 minutes until skin is crispy and golden brown.
Flip the salmon and cook for 2-3 more minutes.
Add in butter and minced garlic. Spoon melted butter over salmon.
Squeeze fresh lemon juice over salmon and cook for an additional 1 minute until done to your liking.
Check for doneness with a meat thermometer (125°F for medium rare).
Notes
Use pre-minced garlic to save time. A non-stick pan can substitute for cast iron. If skipping the thermometer, look for opaque flesh and flaking texture. Squeeze fresh lemon when serving leftovers for revived brightness.