Cowboy Butter Mushroom Tenderloin Tips: Easy Crockpot Dinner

This Crockpot recipe turns just a handful of ingredients into a dinner that tastes like you spent hours at the stove. Two pounds of beef tenderloin tips simmer low and slow with cream of mushroom soup, sweet onions, and a whole stick of garlic-herb butter. The result is spoon-tender beef in a rich, savory gravy that begs to be sopped up with crusty bread or piled over mashed potatoes.

This is the ultimate dump-and-go slow cooker dinner. You simply place the raw beef tenderloin tips in the Crockpot, scatter onions and mushrooms over the top, then dollop on cream of mushroom soup, garlic-herb butter, and a packet of au jus mix.

Cover and walk away. Hours later, you return to a bubbling pot of fork-tender beef in a velvety, herb-flecked gravy. The beauty is in the simplicity: no searing, no stirring, no fuss. Just a handful of pantry staples transformed into a restaurant-worthy meal.

Ingredients

Why this recipe works

The slow cooker works magic on beef tenderloin tips, which are naturally tender but benefit from gentle, moist heat. Cooking on LOW for several hours breaks down the connective tissue while keeping the lean meat moist and succulent.

The cream of mushroom soup acts as a built-in thickener and flavor base, while the garlic-herb butter melts into the sauce, infusing it with rich, savory notes. The au jus mix adds depth and a subtle saltiness that balances the creaminess.

Because the ingredients are simply layered and left to cook, the flavors meld and develop without any hands-on work. The butter and soup create a self-basting environment, so the beef stays juicy and the sauce becomes silky and cohesive.

This method also allows the mushrooms and onions to soften and release their natural sweetness, which rounds out the savory profile. The result is a dish that tastes complex but comes together with almost no effort.

Notes and substitutions

Beef tenderloin tips are the star; they are already quite tender, so they cook relatively quickly. If you can't find them, sirloin or chuck cut into 1-inch cubes works, but you may need to extend the cooking time by an hour or two. For the best flavor, choose a garlic-herb butter with robust seasonings like thyme, rosemary, and chives. If using plain butter, add a couple of minced garlic cloves and a teaspoon of dried herbs to the pot.

The condensed cream of mushroom soup is a key ingredient; do not substitute with a diluted soup or broth, as it provides the creamy base. If you prefer a lighter sauce, you can use cream of celery or chicken soup, but note that it will change the flavor.

The dry au jus mix is essential for that rich, beefy taste; look for it near the gravy mixes in the supermarket. If you avoid gluten, choose a gluten-free au jus mix and check the soup label.

• beef tenderloin tips: beef sirloin or chuck roast cut into 1-inch cubes (cook time may need to increase for tougher cuts)
• garlic-herb butter: 4 tablespoons unsalted butter mixed with 2 minced garlic cloves and 1 teaspoon dried herbs (thyme, rosemary, or parsley)
• dry au jus mix: 1 tablespoon beef base or 1 beef bouillon cube dissolved in 1/4 cup hot water
• cream of mushroom soup: 1 can (10.5 oz) condensed cream of chicken soup (omit if avoiding gluten)

Equipment

• 6-quart or larger slow cooker (Crockpot)
• Cutting board
• Chef's knife
• Measuring cups and spoons
• Can opener
• Serving spoon