Pat the chicken breast dry with paper towels to ensure a proper sear.
In a small bowl, combine the smoked paprika, garlic powder, onion powder, cayenne, sea salt, black pepper, and dried oregano.
Coat both sides of the chicken breast thoroughly with the spice blend, pressing it firmly into the meat.
Heat the olive oil in a heavy-bottomed skillet over medium-high heat until it begins to shimmer.
Place the chicken in the skillet and sear for 5 to 6 minutes per side until a dark crust forms and the internal temperature reaches 165°F.
Remove the chicken from the pan and let it rest on a cutting board for 5 minutes before slicing into thin strips.
In a large mixing bowl, toss the romaine lettuce with the Caesar dressing until the leaves are evenly coated.
Transfer the dressed lettuce to a serving bowl and top with the sliced blackened chicken.
Garnish the salad with the croutons and parmesan cheese before serving immediately.