Instructions

• Heat a large 12-inch skillet over medium heat.
• Add 1 tablespoon butter and the olive oil.
• Add sliced onions and a small pinch of salt.
• Cook for 20–25 minutes, stirring occasionally, until deeply golden and caramelized.
• Reduce heat as needed to prevent burning.
• Add small splashes of water if onions begin sticking.
• Transfer onions to a bowl.
• Increase heat to medium-high and add 1 tablespoon butter.
• Add sliced mushrooms, spreading into an even layer.
• Allow to brown undisturbed for 2–3 minutes before stirring.
• Continue cooking for 8–10 minutes, until moisture evaporates and mushrooms develop golden-brown edges.
• Work in batches if necessary.
• Return caramelized onions to the skillet.
• Reduce heat to medium.
• Add garlic, thyme, rosemary, black pepper, and optional brown sugar.
• Stir for approximately 1 minute until fragrant.
• Sprinkle flour evenly over the mushroom and onion mixture.
• Stir thoroughly and cook for 1–2 minutes to eliminate the raw flour taste.
• Slowly pour in red wine, stirring and scraping the browned bits from the skillet bottom.
• Simmer for 5–7 minutes, allowing the wine to reduce by approximately half.
• Gradually add beef broth while stirring.
• Add Worcestershire sauce and soy sauce.
• Bring to a gentle simmer.
• Simmer uncovered for 8–10 minutes, stirring occasionally, until the gravy reaches a smooth, medium-thick consistency that coats the back of a spoon.
• Add additional broth if too thick.
• Taste and adjust seasoning.
• If additional beef flavor is desired, stir in a small amount of beef bouillon, tasting carefully to avoid oversalting.
• Remove from heat.
• If preparing ahead, cover and set aside until the steaks are nearly ready.
• Refrigerate if holding longer than 2 hours.
• Just before serving, gently reheat over low heat.
• Add a splash of broth if needed.
• Remove from heat and stir in the remaining 1 tablespoon cold butter until melted and incorporated, creating a glossy finish.
• Spoon warm gravy over freshly cooked ribeye steaks or serve alongside.
• If available, incorporate 1–2 tablespoons of steak pan juices into the gravy before adding the finishing butter.
• Note: This rich steakhouse-style gravy combines deeply caramelized yellow onions, browned button mushrooms, reduced red wine, and savory beef broth. Worcestershire and a small amount of soy sauce provide additional umami without overpowering the beef.
• Note: The gravy can be prepared entirely before cooking the steaks. Reserve the final butter addition until reheating for the best texture and shine.
• Note: For a more sauce-like consistency, reduce slightly longer. For a thinner gravy, add additional beef broth.
• Note: Excellent with grilled or pan-seared ribeye steaks, prime rib, roasted beef, or mashed potatoes.