Salisbury Steak with Mushroom Gravy Recipe | Brown Gravy Mix – Fire & Smoke Society

Ingredients

• 4 slices white sandwich bread, crusts trimmed and diced
• ⅓ cup plus 2 tbsp whole milk
• 2 pounds ground beef, preferably about 20% fat
• 1 medium yellow onion, finely chopped, divided
• 2 large egg yolks
• 2 tablespoons Burger Royale seasoning
• Freshly ground black pepper
• Kosher salt, to taste
• 2 tablespoons vegetable oil (or other neutral cooking oil), plus more if needed
• One 16-ounce package sliced cremini (or “baby bella”) mushrooms
• One 1-ounce packet Big Sunday Brown Gravy Mix (see Note)
• 1 tablespoon ketchup