Rinse the rice under cold water using a fine mesh strainer for a minute until the water runs clear then allow to drain well.
Pat your raw shrimp dry using a paper towel.
In a small bowl, whisk together all the seasonings for your Cajun blend.
Preheat a large skillet and melt 2 Tablespoons of the butter.
Add your shrimp in a single layer and sprinkle with half of the homemade Cajun seasoning blend.
Cook until pink and opaque, around 2 minutes on each side, then set aside and cover.
In the same skillet, add remaining 1 Tbsp butter, your rinsed brown rice and the remaining half of the Cajun seasoning blend.
Toast the rice for 1 minute in the skillet. Stir in the broth and bring it to a boil. Once bubbling, reduce the heat to low and cook the rice over low heat, covered, for about 22-25 minutes.
Stir occasionally and add additional liquid, if needed.
Once your rice is done and tender, stir in the cooked shrimp and cilantro.
Serve hot.