Fish Patties Ingredients: 16 ounces canned salmon of mackerel 1 egg 1/3 cup onion, minced 1/2 cup flour 1 1/2 teaspoons baking powder 1 1/2 cups vegetable oil, for frying Directions: Drain salmon. Set aside 2 Tablespoons juice,. Mix together salmon, egg, and onions until sticky. Stir in flour. Add baking powder to juice, then stir into salmon mixture. Form into small patties. Fry until golden brown (about 5 minutes). I make 4 patties and fry them in the deep fryer.