Craving a dinner that feels fancy but behaves like a lazy Sunday? Rosemary lemon butter and a crockpot do all the heavy lifting.
Your oven can take a day off—this single pork tenderloin is tender, juicy, and basically effortless. But here’s the catch!
A quick sear and a little herb butter are the secret to getting restaurant-level flavor without the drama.
Contents
Equipment: Must-haves
- Crockpot (slow cooker)
- Sharp knife
- Cutting board
- Tongs
- Measuring spoons
Equipment: Nice-to-haves
- Skillet (cast-iron preferred)
- Meat thermometer
- Kitchen twine
- Small bowl
- Ladle
Ingredients
- 1 pork tenderloin (about 1.5 lb)
- 2 tbsp butter, softened
- 2 sprig fresh rosemary, leaves chopped
- 1 lemon, zested and juiced
- 3 garlic clove, minced
- 1/2 cup chicken broth
- 1 tbsp olive oil
- 1 tsp Dijon mustard
- 1 tbsp honey
- 1 tsp salt
- 1/2 tsp black pepper
- 1 tbsp cornstarch
- 2 tbsp cold water (for slurry)
Instructions
- Trim the pork tenderloin of any silver skin and excess fat using the knife and cutting board.
- If using kitchen twine, tie the tenderloin loosely to keep an even shape while cooking.
- In a small bowl, mash together butter, chopped rosemary, lemon zest, minced garlic, Dijon mustard, honey, salt, and pepper until smooth.
- Heat the skillet over medium-high heat and add olive oil so it gets shimmering hot.
- Sear the tenderloin on all sides with tongs until golden brown to build flavor, then transfer it to the crockpot.
- Spread half of the herb butter over the top of the tenderloin and tuck the rest alongside it in the crockpot.
- Pour chicken broth into the crockpot and squeeze the lemon juice over the tenderloin for bright acidity.
- Cover the crockpot and cook on low until the pork reaches a safe internal temperature and feels tender when pressed.
- When the tenderloin is nearly done, whisk cornstarch and cold water in a small bowl to make a slurry.
- Carefully remove the tenderloin and set it on a plate to rest while you finish the sauce.
- Ladle cooking liquid into the skillet or keep it in the crockpot and stir in the slurry while you bring the liquid to a gentle simmer to thicken.
- Spoon the thickened sauce over the tenderloin and let it rest a few minutes so the juices settle before slicing.
- Slice the pork against the grain using the knife and serve with spoonfuls of the rosemary lemon butter sauce.
- Use the ladle to drizzle extra sauce on each slice for the best presentation and maximum deliciousness.
Good to Know
Tips: Pat the pork dry before searing to get a nice crust; that little golden edge = big flavor. Timing: Cooking time varies by crockpot; start checking doneness early and use a meat thermometer for accuracy—the safe temp is 145°F with a short rest.
Flavor notes: The lemon brightens the rich butter and the rosemary gives an aromatic, woodsy note that pairs beautifully with pork. Variations: Swap the rosemary for sage if you want a more autumnal vibe.
Replace chicken broth with white wine for a slightly more elegant sauce. Skip honey for a less sweet glaze.
Serving suggestions: Serve slices with mashed potato, roasted vegetable, or a simple green salad to balance the richness. Crusty bread soaks up the sauce and makes you look like you planned this.
Make-ahead and storage: Cool completely, then refrigerate the tenderloin and sauce in separate containers for up to three days. Reheat gently in a skillet or microwave to avoid drying out the pork.
Leftovers: Thinly sliced leftover pork makes excellent sandwiches or a quick pasta topper. Final pro tip: If your sauce is too thin, simmer it a little longer or add a touch more cornstarch slurry—go slow, nobody likes glue.
Enjoy the hands-off magic of the crockpot with a few chef-style moves that make this single pork tenderloin taste like a weekend special.
