In a large pot, heat the butter over medium-high heat until melted and bubbly.
Add in the flour and whisk continuously for 2 minutes or until the roux takes on a golden color.
Add in the chopped onions, bell peppers, celery, and garlic, and cook for 5 minutes or until the vegetables are softened.
Add in the diced tomatoes, bay leaves, salt, cayenne pepper, and Emeril's Original Essence. Stir to combine.
Stir in the shrimp stock and bring to a boil. Reduce heat to low and simmer for 15 minutes.
Add the shrimp and cook for an additional 2-3 minutes or until the shrimp are cooked through.
Serve over steamed white rice and garnish with green onion if desired.