There’s something timeless and comforting about a perfectly roasted pork loin. When cooked in a cast iron skillet, the result is tender, juicy meat with a beautifully caramelized crust. Cast iron cookware is a chef’s best friend—renowned for its ability to retain heat and distribute it evenly, ensuring each bite is packed with rich, savory flavors. Whether you're hosting a dinner party or preparing a special weeknight meal, a cast iron roast pork loin is the perfect dish to impress.
Why Cast Iron and Pork Loin Are a Match Made in Heaven
Pork loin is a lean cut of meat with mild flavor, making it the ideal canvas for a variety of seasonings and marinades. By using a cast iron skillet, you not only achieve a golden sear but also lock in the juices before roasting it to perfection in the oven. The skillet captures those delicious browned bits at the bottom—perfect for creating a flavorful pan sauce. Plus, this versatile dish pairs well with countless sides, making it suitable for almost any occasion.
Ingredients
To make a mouthwatering cast iron roast pork loin, gather the following ingredients:
For the Pork Loin:
- 1 (3-4 lb) boneless pork loin
- 2 tbsp olive oil or vegetable oil
- 3 garlic cloves, minced
- 1 tbsp fresh rosemary, finely chopped (or 1 tsp dried rosemary)
- 1 tbsp fresh thyme, finely chopped (or 1 tsp dried thyme)
- 1 tsp smoked paprika
- 1 tsp salt (adjust to taste)
- ½ tsp black pepper
- 1 tbsp Dijon mustard (optional, for added flavor)
For the Pan Sauce (Optional):
- ½ cup dry white wine or chicken stock
- 1 cup low-sodium chicken broth
- 1 tsp cornstarch, dissolved in 1 tbsp water
- 1 tbsp butter
Step-by-Step Instructions
Step 1: Prepare the Pork Loin
- Remove the pork loin from the fridge 30 minutes before cooking to allow it to reach room temperature. Pat it dry with paper towels—this helps achieve a good sear.
- Mix the garlic, rosemary, thyme, smoked paprika, salt, pepper, and Dijon mustard in a small bowl. Rub this mixture all over the pork loin, making sure to coat it evenly.
Step 2: Preheat the Oven and Cast Iron Skillet
- Preheat your oven to 375°F (190°C).
- Heat a 12-inch cast iron skillet over medium-high heat. Once hot, add the olive oil and swirl it around to coat the surface.
Step 3: Sear the Pork Loin
- Place the seasoned pork loin in the skillet, fat side down. Sear it for 3-4 minutes on each side until caramelized and golden brown. Use tongs to rotate it for even browning.
- Once seared, turn the pork loin so the fat side faces up.
Step 4: Roast the Pork Loin
- Transfer the skillet to the preheated oven. Roast the pork loin for about 45-60 minutes, or until the internal temperature reaches 145°F (63°C) when checked with a meat thermometer in the thickest part.
- After removing the skillet from the oven, cover the pork loosely with aluminum foil and allow it to rest for at least 10-15 minutes. This helps the juices redistribute, ensuring tenderness.
Step 5 (Optional): Make the Pan Sauce
- Place the skillet back on the stovetop over medium heat. Deglaze the pan by adding the white wine or chicken stock, scraping up the browned bits with a wooden spoon.
- Pour in the chicken broth and bring the mixture to a simmer. Stir in the cornstarch slurry to thicken the sauce slightly.
- Finish with a pat of butter for a glossy texture. Taste and adjust seasoning, if needed.
Serving Suggestions
Slice the roast pork loin into half-inch-thick pieces and plate it alongside your favorite sides. Drizzle the pan sauce over the meat if you’ve made it.
Perfect Side Dishes
- Garlic Mashed Potatoes - These creamy, buttery potatoes balance the savory pork.
- Roasted Brussels Sprouts - Toss them with olive oil and roast until crispy for a healthy pairing.
- Honey-Glazed Carrots - The sweet glaze complements the smoky, herby crust of the pork.
- Fresh Green Salad - A light, zesty salad with lemon vinaigrette keeps the meal refreshing.
Wine Pairing
A dry Riesling or Chardonnay works wonderfully with roast pork loin. If you prefer red wine, try a lighter option like Pinot Noir or Beaujolais.
Tips for Success
- Season Thoroughly – Don’t skimp on seasoning. The herbs and spices give the pork loin its signature flavor.
- Use a Meat Thermometer – This ensures your pork is perfectly cooked and not dry.
- Don’t Skip the Resting Time – Allowing the meat to rest post-cooking makes a huge difference in texture and juiciness.
- Customize the Flavor – Feel free to change up the rub by adding ground fennel, cumin, or even a bit of brown sugar for sweetness.
With its crispy exterior and tender interior, this cast iron roast pork loin is a showstopper in every sense. Not only is it simple to make, but it also elevates any gathering, from cozy family dinners to festive holiday feasts. Try this recipe, and it’s sure to become one of your go-to dishes!

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