Stuck in a weeknight dinner rut? You want something impressive but not exhausting. Crock Pot pork tenderloin with mushroom garlic butter delivers tender meat and decadent sauce without babysitting the stove.
But here’s the catch! Minimal effort now, applause at dinner time later.
Contents
Equipment: Must-haves
- Crock pot (slow cooker)
- Skillet (preferably nonstick or stainless steel)
- Cutting board
- Chef knife
- Tongs
- Mixing bowl
- Wooden spoon

Equipment: Nice-to-haves
- Meat thermometer
- Kitchen twine
- Fine-mesh strainer
- Small saucepan
- Serving platter

Ingredients
- 1 (about 1 lb) pork tenderloin
- 1 tablespoon olive oil
- 2 tablespoon unsalted butter, divided
- 8 oz cremini mushroom, sliced
- 3 garlic clove, minced
- 1 small onion, thinly sliced
- 1/2 cup chicken broth
- 1 tablespoon soy sauce
- 1 teaspoon Dijon mustard
- 1 teaspoon fresh thyme leaves, plus extra for garnish
- 1 tablespoon cornstarch
- 2 tablespoon water
- Salt, to taste
- Black pepper, to taste
- 1 tablespoon lemon juice (optional, for finishing)
- Fresh parsley, chopped (for garnish)

Instructions
- Pat the pork tenderloin dry on the cutting board and season all over with salt and black pepper.
- Heat the skillet with olive oil over medium-high heat until it shimmers.
- Sear the pork on all sides until it develops a golden brown crust, using tongs to turn it—this locks in flavor.
- Transfer the pork to the crock pot and nestle it in place.
- In the same skillet, add a little butter and sauté the sliced onion until it softens and smells like kitchen magic.
- Toss the sliced mushroom into the skillet and cook until the mushroom releases its liquid and starts to brown.
- Add half of the minced garlic and fresh thyme to the skillet and cook just until fragrant.
- Pour the chicken broth, soy sauce, and Dijon mustard into the skillet and scrape up any browned bits from the pan with a wooden spoon.
- Pour that savory mixture over the pork in the crock pot.
- Cover and cook on low until the pork is tender and reaches the safe doneness you like.
- While the pork cooks, make the mushroom garlic butter: melt the remaining butter in the skillet over medium heat.
- Add the rest of the minced garlic and cook briefly until aromatic—don’t let it burn, unless you enjoy charcoal flavor.
- Return the sautéed mushroom and onion mixture to the skillet and stir to coat in garlic butter.
- If you want a thicker sauce, whisk the cornstarch and water in a mixing bowl to make a slurry.
- Ladle a bit of the crock pot juices into the skillet, whisking as you add the slurry until the sauce thickens and glossy.
- Slice the rested pork on the cutting board with a sharp knife.
- Plate the pork slices on a serving platter and spoon the mushroom garlic butter over the top.
- Finish with a squeeze of lemon juice if you like brightness, and sprinkle chopped parsley and thyme for color.
- Serve with your favorite side and try to act surprised when everyone asks for the recipe.
What Else You Should Know
Tip: Searing the pork first gives you that restaurant-level crust. That’s why the skillet matters even though the crock pot does most of the work.
Variations: Swap cremini mushroom for shiitake or oyster if you want deeper umami. For a lower-sodium version, use low-sodium chicken broth and reduced soy sauce.
Make-ahead: The pork can be cooked a day ahead and reheated gently; keep the mushroom garlic butter separate and rewarm in a skillet to revive the gloss. Storage: Refrigerate leftovers in an airtight container for up to three days.
Reheat slowly in a skillet or oven to avoid drying out the pork. Serving suggestions: Pair with creamy mashed potato, buttered noodles, or roasted vegetable for a balanced plate.
Nutrition note: This recipe leans into protein-forward comfort; mushrooms add fiber and umami without a lot of calories. Quick swap for paleo: Use coconut aminos instead of soy sauce and skip the cornstarch or use arrowroot.
Joke break: If your crock pot suddenly smells like a five-star kitchen, accept the compliment and pretend you planned it all week.