Make the Cajun butter sauce. Melt the butter and pour into a large bowl. Add the Cajun seasoning, sugar, salt, garlic powder, onion powder, oregano, thyme, smoked paprika, black pepper, and red pepper flakes. Stir to combine. Taste and adjust seasoning if needed.
¾ cup unsalted butter, 2-3 teaspoons sugar, 2 teaspoons Cajun seasoning, 1 - 1½ teaspoons kosher salt, 1 teaspoon onion powder, 1 teaspoon garlic powder, 1 teaspoon thyme, 1 teaspoon oregano, ½ teaspoon black pepper, ½ teaspoon red pepper flakes, ½ teaspoon smoked paprika