Introduction
Lean, tender pork tenderloin gets the rich treatment in this slow cooker garlic butter pork tenderloin recipe, where a generous amount of butter and fresh garlic slowly infuse the meat as it cooks. By the time it’s done, you’re left with impossibly tender pork bathed in a silky, garlicky pan sauce that turns a simple cut of meat into something genuinely special.
I love this one because pork tenderloin can be tricky to cook without drying it out, but the crockpot handles it beautifully, keeping the meat moist while the garlic butter works its magic. It’s proof that you don’t need a long ingredient list to make something taste rich and indulgent — just good butter, plenty of garlic, and a little patience.
Serve it sliced over mashed potatoes or rice, with that garlic butter pan sauce spooned generously on top. However you serve it, this slow cooker garlic butter pork tenderloin recipe is an easy way to bring restaurant-quality flavor to your table.
Why You’ll Love This Recipe
- Rich, buttery garlic flavor — indulgent and deeply satisfying.
- Perfectly tender pork — the crockpot keeps the lean tenderloin from drying out.
- Mostly hands-off cooking — the crockpot does nearly all of the work.
- Built-in pan sauce — no separate gravy needed, it all comes together in one pot.
- Great for meal prep — slices beautifully for lunches throughout the week.
Ingredient Notes
Pork tenderloin, not to be confused with the larger pork loin, is a lean, quick-cooking cut that benefits from the crockpot’s gentle heat, which keeps it tender rather than drying it out the way high, direct heat can. Look for a tenderloin between 1 and 1.5 pounds for the best fit with the sauce amounts in this recipe.
A generous amount of butter is really the star here, infusing the lean pork with richness as it cooks and forming the base of a silky pan sauce at the end. Fresh garlic, rather than the jarred or powdered kind, is essential too, since garlic and butter together are the whole point of this dish.
A splash of chicken broth and a bit of fresh or dried thyme round out the flavor, while searing the pork before it goes into the crockpot adds a deep, caramelized layer of flavor that the slow cooker alone can’t fully replicate. Since pork tenderloin is lean and cooks relatively quickly even in a crockpot, keeping a close eye on the internal temperature is especially important here.
🧈 Slow Cooker Garlic Butter Pork Tenderloin Recipe
Prep Time: 15 minutes | Cook Time: 2.5–3.5 hours (low) or 1.5–2 hours (high) | Total Time: about 3 hours Servings:4–5
Ingredients
For the Pork:
- 1 to 1.5 lb pork tenderloin
- 1 tsp salt
- 1/2 tsp black pepper
- 1 tbsp olive oil
For the Garlic Butter:
- 6 tbsp unsalted butter, divided
- 6 cloves garlic, minced
- 1 tsp dried thyme (or 1 tbsp fresh)
- 1/2 tsp salt
For the Braising Liquid:
- 3/4 cup chicken broth
- 1 tbsp fresh lemon juice
For Finishing:
- 2 tbsp chopped fresh parsley
- Extra cracked black pepper
For Serving:
- Mashed potatoes or rice
Instructions
Step 1: Season and sear the pork. Pat the pork tenderloin dry and season with salt and pepper. Heat the olive oil in a skillet over medium-high heat and sear the pork on all sides for about 1–2 minutes per side, until golden brown. Tip: this searing step is optional but highly recommended — it builds a deep, caramelized flavor base that the crockpot alone can’t fully develop.
Step 2: Make the garlic butter. In a small saucepan over low heat, melt 3 tablespoons of the butter, then add the minced garlic and cook for about 1 minute, just until fragrant. Remove from the heat and stir in the thyme and salt.
Step 3: Place the pork in the crockpot. Transfer the seared pork tenderloin to the crockpot, positioning it in the center as best you can.
Step 4: Add the garlic butter and broth. Pour the melted garlic butter evenly over the pork, then pour the chicken broth and lemon juice around it in the crockpot.
Step 5: Cook on low or high. Cover and cook on low for 2.5 to 3.5 hours, or on high for 1.5 to 2 hours, until the pork reaches an internal temperature of 145°F (63°C). Tip: pork tenderloin is a lean cut and can dry out if overcooked, so start checking the internal temperature toward the lower end of the time range to avoid pushing it too far past done.
Step 6: Remove and rest the pork. Transfer the cooked pork to a cutting board and tent loosely with foil, letting it rest for about 5–10 minutes. This allows the juices to redistribute, keeping the meat moist when sliced.
Step 7: Finish the sauce. While the pork rests, pour the remaining liquid from the crockpot into a small saucepan and bring to a gentle simmer over medium heat. Remove from the heat and swirl in the remaining 3 tablespoons of butter until melted and glossy.
Step 8: Slice and serve. Slice the rested pork tenderloin into medallions, about 1/2 inch thick, and arrange on a serving platter. Spoon the garlic butter sauce generously over the top, garnish with fresh parsley and cracked pepper, and serve with mashed potatoes or rice.
Recipe Notes
- Always check pork tenderloin with a meat thermometer rather than relying on cook time alone, since tenderloins vary in size and can go from perfectly done to overcooked quickly.
- Searing the pork before slow cooking adds extra flavor and color, but it’s fine to skip this step if you’re short on time.
- Avoid boiling the finishing sauce vigorously once the butter is swirled in, since high heat can cause it to separate instead of staying smooth and glossy.
Nutrition Snapshot (Estimated, Per Serving)
- Calories: ~340
- Protein: ~28g
- Carbs: ~2g
- Fat: ~24g
These numbers are estimates based on standard ingredients and do not include mashed potatoes or rice served alongside. Actual values will vary depending on brands and exact portions used.
Storage & Reheating
Leftovers will keep in an airtight container in the fridge for up to 4 days. Reheat gently in a covered skillet over low heat or in the microwave in short bursts, spooning some of the sauce over the pork to help keep it moist.
This dish freezes reasonably well for up to 2 months, since the sauce isn’t heavily cream-based. Thaw overnight in the fridge before reheating gently on the stove or in the microwave.
Budget Note
This recipe costs about $4–5 per serving, with pork tenderloin being a moderately priced cut compared to some other options. To stretch it further, serve it generously over rice or mashed potatoes, and look for pork tenderloin on sale, since prices can vary quite a bit between stores.
Variations
Healthier/Lighter Version: Reduce the butter to about 4 tablespoons total and add a splash of extra chicken broth to compensate, keeping the dish rich while trimming some fat. You’ll still get plenty of garlic butter flavor with this adjustment.
Herb Garden Version: Add fresh rosemary or sage along with the thyme for a more aromatic, herb-forward flavor. This variation pairs particularly well when served with roasted vegetables.
Instant Pot Method: For a faster version, sear the pork directly in the Instant Pot using the sauté function, then add the garlic butter and broth mixture and pressure cook on high for 8–10 minutes with a natural release for 10 minutes. Remove the pork to rest, then finish the sauce using the sauté function before slicing and serving.
Meal-Prep Friendly: Slice the cooked pork and portion it into containers with rice and the sauce for easy lunches throughout the week. Reheat gently, adding a splash of extra sauce or broth to keep the pork from drying out.
Frequently Asked Questions
Can I make this ahead of time? Yes — the garlic butter mixture can be made a day in advance and stored in the fridge, making morning-of prep even faster. The pork itself is best cooked fresh right before serving for the best texture.
How do I know when pork tenderloin is done? Pork tenderloin is fully cooked at an internal temperature of 145°F (63°C), measured with a meat thermometer at the thickest part. Since it’s a lean cut, it’s especially important not to overcook it, as it can dry out quickly past that point.
Can I use pork loin instead of tenderloin? Pork loin is a different, larger cut and will need a longer cook time than tenderloin — typically closer to 5–6 hours on low in a crockpot. If substituting, plan for the extra time and check the internal temperature to confirm doneness.
Why did my sauce turn out oily instead of silky? This usually happens when the butter is swirled in over heat that’s too high, causing it to separate rather than emulsify into a smooth sauce. Remove the pan from the heat before adding the final butter, and avoid boiling the sauce afterward.
What should I serve with garlic butter pork tenderloin? Mashed potatoes or rice are both wonderful for soaking up the rich garlic butter sauce, while roasted or steamed vegetables add a fresh, lighter contrast. A simple green salad also works well if you want something light alongside the richness of the dish.
Related Recipes
- Crockpot Honey Garlic Pork Tenderloin
- Garlic Butter Beef Roast
- Crockpot Onion Gravy Pork Chops