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Cast Iron Skillet Pork Loin with Rich Mushroom Gravy

My grandmother, bless her heart, wasn’t known for culinary innovation. Her repertoire consisted primarily of simple, hearty dishes that could feed a family of ten on a shoestring budget. But one dish I remember vividly, a dish she made often for Sunday suppers, was a pork loin bathed in a creamy mushroom gravy. The scent of browning pork, sautéed onions, and earthy mushrooms simmering together would fill her tiny kitchen, a promise of comfort and togetherness. This cast iron skillet pork loin recipe, while not exactly hers, is a nostalgic nod to those simpler times, a modern take on a classic that evokes warmth and cherished memories.

Recipe Overview

Prep Time: 20 minutes
Cook Time: 1 hour
Total Time: 1 hour 20 minutes
Servings: 4-6
Yield: 1 Pork Loin with Gravy
Dietary Type: Not Gluten-Free

Ingredients

Approximately 2 lbs pork loin
½ teaspoon salt
⅛ teaspoon pepper
1 cup flour (plus extra as needed)
2 tablespoons olive oil
1 ¼ ounces Lipton Onion Soup Mix (one packet)
1 (10 ½ ounce) can cream of mushroom soup
2 cups hot water
2 cups sliced mushrooms
1 medium onion, chopped
1 garlic clove, chopped
2 tablespoons butter

Equipment Needed

Cast iron skillet (with lid)
Mixing bowl
Meat thermometer
Knife
Cutting board

Instructions

Preheat your oven to 375°F (190°C).
Season the pork loin generously with salt and pepper.
Place the flour in a shallow dish or on a plate. Roll the pork loin in the flour, ensuring it’s well-coated on all sides. If needed, use more than one cup of flour to achieve full coverage. The flour will help the pork brown beautifully and contribute to thickening the gravy.
Heat the olive oil in your cast iron skillet over medium-high heat. Once the oil is hot and shimmering, carefully place the floured pork loin in the skillet. Brown the pork loin on all sides, turning it occasionally, until each side is a rich, golden-brown color. This step is crucial for developing flavor and creating a nice sear. Remove the browned pork loin from the skillet and set it aside on a plate.
Add the butter to the skillet, allowing it to melt completely. Add the chopped onion, garlic, and sliced mushrooms to the melted butter. Sauté the vegetables over medium heat until the mushrooms are tender and golden-brown, and the onions are translucent and softened. This usually takes about 5-7 minutes. Stir frequently to prevent burning.
Remove the skillet from the heat. Return the browned pork loin to the skillet, nestling it amongst the sautéed vegetables.
In a mixing bowl, combine the cream of mushroom soup, Lipton Onion Soup Mix, and hot water. Stir until well blended and the soup mix is mostly dissolved.
Pour the soup mixture over the pork loin in the skillet, being careful to leave some of the undissolved bits of onion soup mix on top of the pork. These bits will add extra flavor and visual appeal.
Insert a meat thermometer into the thickest part of the pork loin, making sure it doesn’t touch any bone.
Cover the cast iron skillet with its lid.
Bake in the preheated oven for approximately 1 hour, or until the internal temperature of the pork loin reaches 170°F (77°C). Check the temperature periodically with the meat thermometer to avoid overcooking.
Once the pork loin reaches the desired internal temperature, remove the skillet from the oven. Let the pork loin rest for at least 10 minutes before slicing and serving. This allows the juices to redistribute, resulting in a more tender and flavorful pork loin.

Expert Tips & Tricks

Browning is Key: Don’t rush the browning process. A good sear on the pork loin will add depth of flavor to the final dish.
Adjust the Gravy: If the gravy is too thin, you can thicken it by whisking a tablespoon of cornstarch with a tablespoon of cold water, then stirring it into the gravy during the last 15 minutes of baking.
Don’t Overcook: Pork loin can become dry if overcooked. Using a meat thermometer is crucial for ensuring a perfectly cooked, juicy pork loin.
Make-Ahead Option: You can brown the pork loin and sauté the vegetables ahead of time. Store them separately in the refrigerator, then assemble the dish and bake it when you’re ready to serve.
Flavor Boost: Add a splash of dry sherry or white wine to the skillet while sautéing the mushrooms for an extra layer of flavor.
Even Slices: For easier carving and more even slices, let the pork loin rest for a full 15 minutes before slicing.

Serving & Storage Suggestions

Serve the cast iron skillet pork loin hot, sliced into ½-inch thick portions. Spoon the rich mushroom gravy generously over the pork slices. Excellent side dishes include mashed potatoes, roasted vegetables (such as carrots, Brussels sprouts, or asparagus), or a simple green salad.

Leftover pork loin can be stored in an airtight container in the refrigerator for up to 3-4 days. To reheat, slice the pork and warm it gently in the gravy in a saucepan over low heat, or microwave in short intervals until heated through. Adding a splash of water or broth while reheating can help prevent the pork from drying out.

For longer storage, you can freeze leftover pork loin in an airtight container for up to 2-3 months. Thaw it in the refrigerator overnight before reheating. The texture of the gravy may change slightly after freezing, but it will still be delicious.

Nutritional Information

(Estimated per serving, based on 6 servings)

Nutrient	Amount per Serving	% Daily Value
Calories	450 kcal	23%
Total Fat	25g	38%
Saturated Fat	10g	50%
Cholesterol	100mg	33%
Sodium	800mg	35%
Total Carbohydrate	25g	8%
Dietary Fiber	2g	7%
Sugars	4g	8%
Protein	30g	60%

Variations & Substitutions

Gluten-Free: Use a gluten-free all-purpose flour blend for coating the pork loin. Ensure the cream of mushroom soup and onion soup mix are also gluten-free.
Dairy-Free: Substitute the butter with olive oil or a dairy-free butter alternative. Use a dairy-free cream of mushroom soup.
Herb Infusion: Add fresh herbs like thyme, rosemary, or sage to the skillet while sautéing the vegetables for an aromatic twist.
Vegetable Medley: Add other vegetables to the skillet, such as bell peppers, carrots, or celery, for a heartier dish.
Wine Sauce: Replace the cream of mushroom soup with a dry white wine and chicken broth for a lighter, more sophisticated sauce. Reduce the liquid in the skillet after baking to thicken the sauce.

FAQs (Frequently Asked Questions)

Q: Can I use a different cut of pork?
A: While pork loin is recommended for its tenderness and leanness, you could use pork tenderloin as a substitute. Adjust the cooking time accordingly, as pork tenderloin cooks faster.

Q: Do I really need to brown the pork loin first?
A: Yes, browning the pork loin is a crucial step for developing flavor. It creates a Maillard reaction, which contributes to the overall richness of the dish.

Q: Can I make this recipe without a cast iron skillet?
A: While a cast iron skillet is ideal for even heat distribution and searing, you can use another oven-safe skillet with a lid.

Q: My gravy is too thin. How can I thicken it?
A: Whisk together 1 tablespoon of cornstarch with 1 tablespoon of cold water, then stir it into the gravy during the last 15 minutes of baking.

Q: Can I add potatoes to the skillet?
A: Yes, you can add peeled and cubed potatoes to the skillet along with the onions and mushrooms. Adjust the cooking time as needed to ensure the potatoes are tender.

Final Thoughts

This Cast Iron Skillet Pork Loin is more than just a recipe; it’s an invitation to create a comforting and flavorful meal that’s perfect for a weeknight dinner or a special occasion. The combination of tender pork, rich mushroom gravy, and simple ingredients makes it a dish that’s sure to please everyone at the table. So, gather your ingredients, preheat your oven, and prepare to be transported to a place of warmth and culinary satisfaction. Don’t be afraid to experiment with variations and substitutions to make it your own. And most importantly, share your creations and experiences with others – food is meant to be enjoyed and celebrated!

Cast Iron Skillet Pork Loin Recipe