How to Make It
Stir together milk, hot sauce, and 1 tsp. salt in a 13- by 9-inch baking dish; add fillets, turning to coat. Cover and chill 2 hours. Drain, discarding marinade.
Combine flour and pepper in a shallow dish. Dredge fillets in flour mixture.
Melt 1/4 cup butter with oil in a large skillet over medium heat. Fry fillets, in batches, in butter mixture 2 minutes on each side or until fish flakes with a fork. Transfer to a serving platter; keep warm.
Combine remaining 1/2 cup butter and almonds in a saucepan; cook over medium heat, stirring often, until almonds are lightly browned. Add lemon juice, Worcestershire sauce, and remaining 1/2 tsp. salt; cook, stirring constantly, 1 minute. Remove from heat; stir in parsley. Pour almond mixture over fillets, and serve immediately.
Trout fillets are sold as single fillets, or sometimes as a “saddle.” Be sure to buy the smaller, single fillets, if possible, so that they will fit in your skillet with ease.