Slow Cooker 3 Ingredient Beef Tenderloin
This slow cooker 3-ingredient beef tenderloin is proof that an impressive Sunday dinner doesn’t have to require hours in the kitchen. With just beef tenderloin, savory beef broth, and butter, you can create an incredibly tender, flavorful roast with very little hands-on preparation.
The slow cooker gently cooks the beef while the butter and broth create a rich, savory cooking liquid that can be reduced into a simple sauce. Serve the sliced tenderloin with creamy mashed potatoes, roasted vegetables, or buttery green beans for an easy dinner that feels wonderfully special.
Why You’ll Love This Slow Cooker Beef Tenderloin
- Only 3 main ingredients – Perfect when you want an elegant meal without a long shopping list.
- Minimal hands-on cooking – The slow cooker does most of the work.
- Tender and flavorful – Beef tenderloin is naturally one of the most tender cuts of beef.
- Perfect for Sunday dinner – A simple way to create a restaurant-style meal at home.
- Easy to customize – Add your favorite herbs, pepper, or vegetables when serving.
- Great for special occasions – Ideal for family dinners, holidays, anniversaries, and entertaining.
Ingredients
- 2½ to 3 pounds whole beef tenderloin, trimmed and tied
- 1½ cups low-sodium beef broth
- 4 tablespoons salted butter, cut into small pieces
Optional for serving: freshly cracked black pepper, fresh herbs, mashed potatoes, asparagus, green beans, or roasted vegetables.
How to Make 3 Ingredient Beef Tenderloin in the Slow Cooker
1. Prepare the beef
Pat the beef tenderloin thoroughly dry with paper towels. Let it sit at room temperature for about 20 minutes while you prepare the slow cooker.
2. Add the beef and broth
Place the beef tenderloin in a 5- to 6-quart slow cooker. Pour the beef broth around and over the tenderloin. The beef does not need to be completely submerged.
3. Add the butter
Dot the top of the tenderloin with the pieces of salted butter. Cover the slow cooker securely with the lid.
4. Cook on LOW
Cook on LOW until the tenderloin reaches your desired doneness. Because beef tenderloin is a naturally tender and relatively lean cut, begin checking the internal temperature early rather than relying only on cooking time.
For food safety, the USDA recommends cooking whole cuts of beef to 145°F, followed by a 3-minute rest. Use an instant-read thermometer inserted into the thickest part of the tenderloin.
5. Rest the beef
Carefully transfer the cooked tenderloin to a cutting board. Loosely cover it with foil and allow it to rest for at least 10–15 minutes before slicing.
Resting helps the juices redistribute throughout the meat, making the slices more succulent.
6. Make the easy beef sauce
While the beef rests, strain the cooking liquid if desired and transfer it to a saucepan. Simmer over medium heat until it reduces slightly and develops a richer, more concentrated beef flavor.
For an even silkier sauce, whisk in a small piece of butter at the end.
7. Slice and serve
Slice the rested beef tenderloin into medallions about ½ to ¾ inch thick. Arrange the slices on a serving platter and spoon the warm beef sauce over the top.
Serve immediately with mashed potatoes, roasted asparagus, green beans, creamy polenta, or a crisp green salad.
Best Side Dishes for Beef Tenderloin
This easy beef tenderloin pairs beautifully with classic comfort-food sides. Try:
- Creamy mashed potatoes
- Roasted asparagus
- Garlic green beans
- Creamy polenta
- Roasted carrots
- Garlic mashed cauliflower
- Dinner rolls
- Simple green salad
The rich beef sauce is especially delicious spooned over mashed potatoes.
Tips for the Best Slow Cooker Beef Tenderloin
Use a meat thermometer. Beef tenderloin can overcook quickly, so checking the internal temperature is much more reliable than following a fixed cooking time.
Don’t skip the resting period. Allowing the beef to rest before slicing helps retain its juices.
Avoid overcooking. Tenderloin is much more delicate than tougher slow-cooker cuts such as chuck roast. Keep an eye on the temperature.
Use low-sodium broth if possible. Butter adds salt, and reducing the cooking liquid concentrates its flavor. Starting with low-sodium beef broth gives you better control over the final seasoning.
Add flavor at serving time. Freshly cracked black pepper, chopped parsley, rosemary, or thyme can add extra flavor without complicating the recipe.
Optional searing: For deeper roasted flavor, sear the tenderloin briefly in a very hot skillet before placing it in the slow cooker. This adds an extra step but creates a more developed crust.
How to Store Leftover Beef Tenderloin
Place leftovers in an airtight container and refrigerate within 2 hours of cooking. Store the beef and sauce together when possible to help prevent the meat from drying out.
For the best quality, use refrigerated leftovers within 3–4 days.
To reheat, warm the beef gently in a covered skillet or baking dish with a spoonful of the sauce. Avoid high heat, which can make tenderloin dry and tough.
Frequently Asked Questions
Can I make beef tenderloin in a slow cooker?
Yes. Beef tenderloin can be cooked gently in a slow cooker, but because it is already a tender cut, it should not be treated like a tough roast that requires many hours of cooking.
What can I use instead of beef broth?
Low-sodium beef stock can be used in the same quantity. You can also use a combination of beef broth and water if you want a lighter sauce.
Should I sear beef tenderloin before slow cooking?
Searing is optional. It adds a browned exterior and deeper roasted flavor, while skipping the searing step keeps this recipe extremely simple.
What temperature should beef tenderloin reach?
For food safety, the USDA recommends 145°F for whole cuts of beef followed by a 3-minute rest. Always check the temperature in the thickest portion with an instant-read thermometer.
