Slow Cooker Lamb Tenderloin: Simple & Flavorful (Print Version)
Easy Lamb Tenderloin Crockpot recipe. Tender, flavorful lamb with minimal effort. Perfect for weeknights or a comforting family dinner.
# Recipe Info:
Prep Time: 20 Minutes minutes
Cook Time: 300 Minutes minutes
Total Time: 320 minutes
Servings: 4 Servings
Difficulty: Beginner
Cuisine: American
Dietary: Gluten-Free
# Ingredients:
→ Main Event
01 -
1 ½-2 lbs lamb tenderloin
02 -
1 tbsp olive oil (for searing)
→ Aromatics & Veggies
03 -
1 large yellow or white onion, chopped
04 -
4-6 cloves garlic, minced
→ Flavor Builders
05 -
2 cups low-sodium beef broth
06 -
1 tbsp Worcestershire sauce
07 -
1 tsp dried rosemary
08 -
1 tsp dried thyme
09 -
Salt and freshly ground black pepper, to taste
→ Finishing Touches
10 -
2 tbsp cornstarch
11 -
2 tbsp cold water (for slurry)
12 -
Fresh parsley or chives, chopped (optional, for garnish)
# Instructions:
01 -
First things first, pat your lamb tenderloin dry with paper towels. This helps with searing, which we're going to do in a hot pan for just a few minutes, honestly! Don't skip this step, it builds so much flavor. While that’s happening, roughly chop your onion and mince your garlic. The smell of garlic hitting a hot pan? That’s my happy place, every single time. Get your crockpot ready – I sometimes use a liner for easy cleanup, because who needs more dishes?
02 -
Heat a bit of oil in a skillet over medium-high heat. Once it's shimmering, sear the lamb tenderloin for about 2-3 minutes per side, just until it's nicely browned. We’re not cooking it through, just getting that gorgeous crust. This step adds so much depth to our Easy Lamb Tenderloin Crockpot Recipe, so please don't skip it. I’ve tried to skip it once when I was in a rush, and the lamb just wasn’t as rich. Learn from my oops!
03 -
Place the seared lamb tenderloin into your slow cooker. Scatter the chopped onion and minced garlic around it. Pour in the beef broth and Worcestershire sauce. Sprinkle in the dried rosemary and thyme, then season generously with salt and pepper. This is where all the magic starts to happen, soaking into the lamb. The aroma already begins to build, even before it starts cooking – it’s a promise of good things to come!
04 -
Cover your crockpot and cook on low for 4-6 hours, or on high for 2-3 hours. The cooking time can vary a bit depending on your specific slow cooker and the thickness of your lamb, so keep an eye on it. The lamb should be incredibly tender, easily shreddable with a fork. I always peek around the 4-hour mark on low, just to make sure everything's happy in there.
05 -
Once the lamb is cooked, carefully remove it from the crockpot and set it aside on a cutting board to rest. Skim off any excess fat from the liquid in the crockpot if you want. In a small bowl, whisk together the cornstarch and cold water to create a slurry. Stir this slurry into the hot liquid in the crockpot. Turn the heat to high (if it's not already) and let it simmer for about 10-15 minutes, stirring occasionally, until the sauce has thickened to your liking. This is where my kitchen can get a little messy, so I usually have a spoon rest handy!
06 -
Slice the rested lamb tenderloin into thick medallions or, if it's super tender, you can even shred it. Serve the lamb with that luscious, thickened sauce spooned generously over the top. The final result should be melt-in-your-mouth lamb with a rich, aromatic gravy. It looks impressive, but honestly, it was so little effort. Garnish with a bit of fresh parsley if you’re feeling fancy, or just dig right in!
# Notes:
01 -
Always sear your lamb first; it makes a HUGE difference in flavor.
02 -
Reheat leftovers gently on the stovetop to keep the sauce from separating.
03 -
If you're out of beef broth, vegetable broth can work, but beef adds more depth.
04 -
Serve this lamb over creamy mashed potatoes to soak up all that delicious sauce.
# Tools You'll Need:
01 -
Slow cooker (Crockpot)
02 -
large skillet
03 -
cutting board
04 -
whisk
05 -
small bowl
# Nutrition Facts (Per Serving):
Calories: 350 kcal
Total Fat: 18 g
Total Carbohydrate: 10 g
Protein: 35 g