Craving an easy dinner that makes you look like a kitchen wizard without the drama? This Mustard Herb Crockpot pork tenderloin delivers juicy, flavorful meat with zero babysitting.
Pop things in the slow cooker, go live your life, and come back to dinner that smells like you tried really hard. That’s why crockpot magic exists — and yes, you can high-five yourself afterwards.
Contents
Equipment: Must-haves
- Crockpot (slow cooker) — the star of the show
- Mixing bowl — for the mustard-herb rub
- Measuring spoon — for accuracy and bragging rights
- Sharp knife — for trimming and slicing
- Cutting board — your tenderloin’s stage
- Tongs — to move the tenderloin without acting like a barbecue wrestler
Equipment: Nice-to-haves
- Cast iron skillet — to sear the tenderloin and boost flavor
- Meat thermometer — for precise doneness (no guesswork)
- Kitchen twine — to tie the tenderloin if it’s flopping around
- Silicone brush — to spread mustard like a tiny paintbrush
Ingredients
- 1 pork tenderloin (about 1 to 1¼ lb) — single proud hero of the dish
- 2 tbsp Dijon mustard
- 1 tbsp whole-grain mustard
- 1 tbsp fresh rosemary, chopped (or use dried if you must)
- 1 tbsp fresh thyme, chopped (or dried)
- 3 cloves garlic, minced
- 1 tbsp olive oil
- 1 small onion, sliced into rings
- 1/2 cup low-sodium chicken broth
- 1 tbsp honey (for a gentle glaze)
- 1 tbsp soy sauce (or Worcestershire sauce for depth)
- 1 tsp salt
- 1/2 tsp black pepper
- 1 tbsp butter (optional, for searing)
- 1 tsp cornstarch (optional, for gravy)
- 1 tbsp cold water (optional, to mix with cornstarch)
Instructions
- Trim any silver skin from the pork tenderloin on the cutting board with the sharp knife.
- Measure mustards, herbs, garlic, olive oil, honey, soy sauce, salt, and pepper into the mixing bowl and stir until everything looks like a friendly paste.
- If using kitchen twine, tie the tenderloin loosely so it keeps a neat shape while cooking.
- If you have a cast iron skillet and want extra flavor, heat the skillet with butter until it sizzles and briefly sear the tenderloin on all sides with tongs to build a golden crust; otherwise skip this step and nothing will explode.
- Using the silicone brush or a spoon, spread the mustard-herb mixture evenly over the tenderloin like you mean it.
- Arrange sliced onion in the bottom of the crockpot to make a soft flavor bed.
- Place the mustard-coated tenderloin on top of the onion in the crockpot.
- Pour chicken broth into the crockpot around the tenderloin, being careful not to wash the rub off the top.
- Cover and cook on low until the pork is tender and reaches safe doneness; use a meat thermometer to confirm by inserting it into the thickest part of the tenderloin.
- When the pork reaches the correct temperature, transfer it to a cutting board and let it rest so the juices settle and you don’t burn your mouth like a hero.
- If you want a quick pan sauce, pour the crockpot juices into a small saucepan, bring to a simmer, and whisk in the cornstarch slurry until it thickens.
- Slice the tenderloin against the grain into medallions and spoon the sauce and onions over the top for serving.
Good to Know
Tip: Rest is not optional. Let the pork rest so it stays juicy.
Variation: Swap fresh herbs for dried at a 3:1 ratio if fresh isn’t available. Dried herbs are less dramatic, but still helpful.
Sear or skip? Searing is optional but gives a brown crust and deeper flavor.
If you skipped searing, your crockpot will still make tender, tasty pork. Doneness guide: Use a meat thermometer and pull the pork at just under the target temp; carryover will finish the job.
The safe internal temperature for pork is the goal you should aim toward. Sauce idea: For a glossy sauce, thicken slow-cooker juices with a cornstarch slurry and a hit of honey.
It’s like turning gravy from functional to flirtatious. Serving suggestion: Serve sliced tenderloin over mashed potato, rice, or buttered noodles with a spoonful of the sauce.
Add a crisp green vegetable for color and minimal guilt. Make-ahead: You can refrigerate the cooked tenderloin and sauce separately for up to three days; reheat gently to avoid drying.
Leftover idea: Slice cold for sandwiches with mustard and arugula, and tell your lunchmates it’s gourmet. Nutrition note: This recipe leans protein-forward and lower in added sugar than many glazes, especially if you use low-sodium broth and modest honey.
