Preheat your cast-iron skillet over medium-high heat and add a tablespoon of olive oil, letting it shimmer.
Add the minced garlic to the hot oil and cook for about 30 seconds until fragrant, seeing bubbles form and smelling the aromatic aroma fill the kitchen.
Sprinkle in the paprika, smoked paprika, and cayenne pepper, stirring quickly to coat the garlic and release vibrant, smoky fragrances, and watch as the oil turns a deep red hue.
Place the shrimp into the skillet, spreading them out in a single layer, and hear a gentle sizzle as they start to cook.
Cook the shrimp for about 2-3 minutes on one side, flipping them as they turn bright pink and the edges begin to curl, indicating they’re just about done.
Continue to cook for another 2-3 minutes, tossing gently with a spatula until all shrimp are evenly coated in the spicy oil and have a slightly crispy exterior.
Season with salt and pepper to taste, adjusting the heat and saltiness for your preference, and cook for another minute until everything is well combined and fragrant.
Remove the skillet from heat and transfer the spicy Cajun shrimp to a serving plate, showcasing their vibrant color and tender texture.