Bourbon Gravy Mushroom Tenderloin Tips: 5-Ingredient Crockpot Dinner Step-by-step instructions

Before you start

Before you start, make sure you have a 6-quart slow cooker and an instant-read thermometer. If you are serving the dish with rice, start the rice about 30 minutes before the beef is done so both are hot at the same time.

The beef can sit in the slow cooker on warm for up to an hour, so timing is flexible. Have all your ingredients measured and ready: the cream of mushroom soup, diced onions, bourbon gravy, and butter. No browning or pre-cooking is needed — just layer everything in the slow cooker in the order listed.

Instructions

Layer and Set

1. 1Layer the Ingredients
   Place the beef tenderloin tips in the bottom of a 6-quart slow cooker in an even layer. Pour the condensed cream of mushroom soup over the beef, then scatter the diced white onions evenly over the top.
   Look for The beef is mostly covered by soup and onions; no need to stir.
   Tip Trimming excess fat from the beef is optional but helps keep the gravy clean.
2. 2Add the Gravy and Butter
   Pour the bourbon mushroom gravy over the beef and onions. Dot the top with the salted butter pats. Do not stir; the layers will meld during cooking.
   Look for The butter pats sit on top of the gravy; the liquid level should be just below the top of the beef.
   Tip Using cold butter straight from the fridge is fine; it will melt slowly into the sauce.

At the end of this phase, the slow cooker insert holds a neat stack: raw beef at the bottom, a thick layer of cream of mushroom soup and onions on top, and the bourbon gravy and butter pats finishing the top.

The ingredients look distinct but not mixed. The butter is still solid, and the gravy is thick and dark. This is the 'dump it in' moment — everything will meld during the long cook.

Slow-Cook to Tender

3. 3Slow-Cook on Low
   Cover the slow cooker and cook on low for 6 to 7 hours, until the beef is fork-tender and the gravy is bubbling. Do not lift the lid during the first 4 hours to keep the heat steady. Let it rest for 3 minutes before slicing.
   Look for The gravy is gently bubbling around the edges and the beef is easily pierced with a fork.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Cooking on low keeps the tenderloin tips tender; high heat can toughen lean beef.
4. 4Check the Beef Temperature
   After 6 hours, insert an instant-read thermometer into the thickest piece of beef. The temperature should read at least 145°F (63°C). If not, continue cooking in 30-minute increments until it reaches that temperature. Let it rest for 3 minutes before slicing.
   Look for The thermometer reads 145°F (63°C) or higher; the beef is tender.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Tenderloin tips are lean, so they are done when just past medium-rare; longer cooking makes them shred.
5. 5Let the Beef Rest
   Turn off the slow cooker and let the beef rest in the hot gravy for at least 3 minutes before serving. This allows the juices to redistribute and the meat to stay moist.
   Look for The beef is resting in the warm gravy; the sauce has slightly thickened.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Resting is essential for lean cuts; skip it and the beef may taste dry.

After 6 to 7 hours, the kitchen smells deeply savory and slightly sweet from the bourbon. The gravy is bubbling slowly around the edges, and the surface is glossy. The beef is visibly darker and tender; a fork slides in with almost no effort. The onions have softened into the sauce, and the butter has fully melted, giving the gravy a silky sheen. The temperature reads at least 145°F (63°C).

Serve and Enjoy

6. 6Serve Over Rice
   Spoon the beef and gravy over cooked white rice on individual plates. Ladle extra gravy over the top. Serve hot.
   Look for The beef is coated in glossy gravy; the rice absorbs the sauce.
   Tip Warm the rice before serving so the dish stays hot.

The beef is now resting in the rich, glossy gravy. When spooned over rice, the meat is coated in a velvety sauce that drips slowly. The rice absorbs the gravy, and each bite is tender, savory, and comforting. The dish looks like a hearty home-cooked meal, with the dark gravy contrasting with the white rice. A final spoonful of extra gravy over the top ensures nothing is left dry.

Common mistakes

One common mistake is lifting the lid too often, which lets heat escape and extends cooking time. Resist the urge to peek for the first 4 hours. Another is cooking on high, which can make the lean beef tough and dry; low and slow is the way to go.

Also, do not skip the rest time — cutting into the beef immediately can cause the juices to run out, leaving the meat dry. Finally, be careful not to add extra liquid; the soup and gravy provide enough moisture.

How to tell it’s done

The beef is done when it is fork-tender and the internal temperature reaches at least 145°F (63°C) for medium-rare to medium. Because tenderloin is lean, it is best not to overcook it; check after 6 hours.

The gravy should be bubbling gently and slightly thickened. To test, insert a fork into a piece of beef — it should slide in easily with no resistance. Let the beef rest in the warm gravy for at least 3 minutes before serving to allow the juices to redistribute.

• Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest