Craving a dinner that smells like a restaurant but requires zero chef ego? You want juicy pork tenderloin with a silky mushroom butter sauce and minimal babysitting.
That’s possible with a slow cooker, a hot skillet, and a small amount of patience. But here’s the catch!
You’ll look like you planned this entire menu for weeks, even if you found the tenderloin in a last-minute rescue mission.
Contents
Equipment: Must-haves
- Slow cooker (crockpot)
- Skillet (oven-safe or cast-iron preferred for sear)
- Knife
- Cutting board
- Tongs
- Measuring spoon and measuring cup
- Spoon or spatula
Equipment: Nice-to-haves
- Instant-read thermometer (handy for perfect doneness)
- Fine-mesh strainer (for smooth sauce)
- Small bowl (for a cornstarch slurry)
- Fresh herb chopper (for parsley, if you like to look official)
Ingredients
- 1 pork tenderloin (about 1 to 1.25 lb), trimmed and patted dry
- 4 tbsp unsalted butter, divided
- 1 cup sliced mushroom (choose cremini or button)
- 1 onion, thinly sliced
- 2 clove garlic, minced
- 1 cup chicken broth
- 1/4 cup heavy cream
- 1 tbsp Dijon mustard
- 1 tbsp soy sauce
- 1 tsp dried thyme
- Salt, to taste
- Black pepper, to taste
- 1 tbsp cornstarch
- 1 tbsp water
- 1 tbsp olive oil (optional, for searing)
- 1 tbsp chopped parsley, for garnish
Instructions
- Season the pork tenderloin with salt and pepper on all sides like you mean it.
- Heat the skillet over medium-high heat and add a splash of olive oil if using.
- Sear the pork on all sides until browned to create flavor and avoid a sad gray roast.
- Transfer the pork to the slow cooker and set aside the skillet with fond for later.
- Melt some butter in the same skillet, then add sliced mushroom and sliced onion and sauté until they start to soften.
- Add minced garlic and cook briefly until fragrant, being careful not to burn it.
- Pour in chicken broth to deglaze the skillet, scraping up browned bits with a spoon.
- Stir in Dijon mustard, soy sauce, and dried thyme to the skillet liquid, then pour the whole pan over the pork in the slow cooker.
- Dot the remaining butter over the pork so it melts into the sauce while cooking.
- Cover the slow cooker and cook on low until the pork reaches a safe internal temperature and is tender.
- Remove the pork from the slow cooker and tent it loosely with foil to rest while you finish the sauce.
- Skim any excess fat from the surface of the sauce and transfer the sauce to the skillet over medium heat.
- Whisk heavy cream into the sauce and bring to a gentle simmer to marry the flavors.
- Mix cornstarch with water in a small bowl to make a slurry, then whisk it into the simmering sauce to thicken until silky.
- Taste and adjust seasoning with salt and pepper, then stir in chopped parsley for freshness.
- Slice the rested pork and spoon the mushroom butter sauce over each slice before serving.
What Else You Should Know
Tip: Searing the pork creates flavor and keeps the meat juicy. That’s why taking five extra minutes at the stovetop matters.
Variation: Swap heavy cream for half-and-half if you want something lighter, but the sauce will be slightly less rich. Make-ahead: Cook the pork a day ahead and reheat gently; the sauce actually deepens in flavor overnight.
Serving suggestion: Serve over mashed potato, buttered noodle, or a bed of simple green to soak up the sauce. Doneness note: Use an instant-read thermometer to check for perfect doneness — aim for an internal temperature just under the highest safe point so the pork stays tender.
Thickening hint: If the sauce is too thin, let it simmer uncovered to reduce, or add another pinch of cornstarch slurry. Leftover love: Slice leftover pork cold for sandwiches with mustard and pickles.
Yes, really—trust me on this one. Final note: Keep the language simple, laugh when the sauce splatters, and enjoy a restaurant-style dinner that practically makes itself.
