All the ingredients to make the cajun seasoning are combined in a bowl. Over medium heat, melt 2 tablespoons butter into a large aluminum skillet. Stir in the garlic, half of cajun seasoning, the rice, and the water.
Mix in chicken broth. Cook for 15 mins, stirring once or twice throughout.
While the rice is being cooked, prepare the shrimp. Sprinkle the sauce over the shrimp, and toss well.
Stir in the shrimp and cover. Cook for another 3-5 mins until shrimp are opaque and pink. Sprinkle with chopped parsley if you like and enjoy.