Mix the brown sugar, smoked paprika, garlic powder, onion powder, salt, and pepper in a bowl.
Rub the seasoning mixture generously on both sides of the pork shoulder blade steak.
Heat a cast-iron skillet over medium-high heat and add olive oil.
Once hot, sear the steak for 3-4 minutes on each side until a golden crust forms.
Add soy sauce and apple cider vinegar to the skillet for extra flavor.
Transfer the steak to an oven-safe dish and cover with foil.
Bake in a preheated oven at 325°F (160°C) for 1.5 to 2 hours.
Check the internal temperature with a meat thermometer; it should read 145°F (63°C) at the thickest part.
Let the steak rest under foil for 10 minutes to retain juices.
Slice and garnish with fresh herbs if desired before serving.