Craving a weeknight dinner that tastes like you spent all day fussing but actually took a nap? You’re in the right place.
This crock pot cranberry pork tenderloin turns simple ingredients into a cozy, impressive meal. But here’s the catch!
It’s forgiving, low-effort, and just fancy enough to fool guests. You’ll get juicy tenderloin, tangy cranberry glaze, and a sauce worth spooning over everything.
Let’s make dinner that behaves like takeout but hugs like home.
Contents
Equipment: Must-haves
- Crock pot (slow cooker)
- Skillet or frying pan (for searing)
- Cutting board
- Sharp knife
- Tongs
- Measuring cup and measuring spoons

Equipment: Nice-to-haves
- Meat thermometer (to check doneness)
- Kitchen twine (to keep the tenderloin neat)
- Small saucepan (for thickening sauce)
- Ladle (for serving)
- Silicone spatula

Ingredients
- 1 pork tenderloin (about 1 to 1.5 lb)
- 1 cup cranberry sauce (whole-berry or jellied, your choice)
- 1/2 cup brown sugar (packed)
- 1/4 cup Dijon mustard
- 2 tbsp soy sauce
- 1/4 cup chicken broth (or water)
- 1 red onion, thinly sliced
- 2 cloves garlic, minced
- 1 tsp dried rosemary (or 1 tbsp fresh, chopped)
- Salt, to taste
- Black pepper, to taste
- 1 tbsp olive oil (for searing)
- 1 tbsp balsamic vinegar (optional, for brightness)
- 1 tbsp cornstarch (for slurry, optional)
- 2 tbsp cold water (for slurry, optional)

Instructions
- Pat the pork tenderloin dry and season it with salt and black pepper on all sides.
- If using, tie the tenderloin with kitchen twine to create an even shape for cooking.
- Heat the skillet over medium-high heat and add the olive oil until shimmering.
- Sear the pork on all sides until golden brown; you want color, not a full cook-through.
- Transfer the pork to the crock pot using tongs and set aside the skillet.
- In the measuring cup, whisk together the cranberry sauce, brown sugar, Dijon mustard, soy sauce, chicken broth, minced garlic, dried rosemary, balsamic vinegar, and a pinch of salt and pepper.
- Place the thinly sliced red onion in the bottom of the crock pot to make a flavor bed for the pork.
- Pour most of the cranberry mixture over the pork, reserving a few spoonfuls in the skillet for later thickening if desired.
- Cover and cook on low until the pork reaches a safe internal temperature; check with the meat thermometer by inserting into the center of the tenderloin.
- When the pork reaches the correct temperature, transfer it to a cutting board and let it rest so juices can redistribute.
- If you want a glossy, thicker sauce, pour the reserved cranberry mixture into the skillet and bring to a gentle simmer.
- Mix the cornstarch with cold water to make a slurry, then whisk it into the simmering sauce until it thickens to your liking.
- Slice the rested pork into medallions and return the slices to the crock pot for a minute to warm in the sauce, or arrange on a platter and spoon the thickened sauce over the top.
- Serve with a ladle of extra sauce and any pan juices from the crock pot, and enjoy the applause (or polite chewing sounds).

Good to Know
Tip: Searing is optional but recommended; it adds flavor and gives you a nicer-looking dish. If you skip searing, increase the cooking time slightly.
Variation: Swap the Dijon for whole-grain mustard for texture, or add a splash of orange juice for citrus brightness. That’s why you should taste the sauce before finishing — adjust sugar or vinegar to balance sweet and tang.
Serving suggestion: Spoon the cranberry sauce over mashed potato or rice, or slide the pork medallions onto a toasted bun for a sandwich that makes Mondays feel celebratory. Make-ahead note: The pork keeps well refrigerated for up to three days.
Reheat gently in the crock pot on low or in a covered skillet to avoid drying out. Good to know: The tenderloin is lean and benefits from resting after cooking so it stays juicy.
If you prefer a thinner sauce, skip the cornstarch and strain the pan juices into a small saucepan to reduce a little. A final laugh: If anyone asks whether you cooked all day, wink and say, “Yes—about eight hours,” then let the crock pot take the credit.