To Make Creole Spice Mix: Mix together all spices in a bowl. Transfer the spices to a clean container with a tight-fitting lid. Store up to six months.
To Make Trout Amandine: Pour the milk into a breading tray or wide dish. Put the flour and 1 tablespoon Creole Spices into another breading tray and stir to combine. Season the filets with salt and pepper, dip them into the milk and dredge in the seasoned flour.
Melt 4 tablespoons of the butter in a large skillet over medium-high heat. Add the fillets and cook on each side until golden brown, about 3 minutes per side. Transfer the fish to a serving platter.
Add the remaining 4 tablespoons butter to the same skillet over medium-high heat. Swirl the skillet over the heat so that the butter melts evenly and cook until the butter turns brownish, 3-4 minutes. Reduce the heat to medium-low, add the almonds, and cook, stirring gently, until the nuts are toasty brown, about 2 minutes. Add the lemon juice, parsley, and a dash of salt.
Spoon the browned butter and almonds over the fish and serve.