How to Cook Costco Pork Tenderloin to Perfection: A Simple Guide

Pork tenderloin is one of the most versatile and delicious cuts of meat. It’s tender, lean, and full of flavor. Costco sells high-quality pork tenderloins at an affordable price, which makes it a budget-friendly dinner option. But how exactly should you cook a Costco pork tenderloin? Follow this simple guide for tips, tricks, and techniques to cook Costco pork tenderloin perfectly every time.

Selecting the Right Pork Tenderloin from Costco

The first step is choosing the right pork tenderloin from Costco’s selection. Here’s what to look for:

  • Size – Pork tenderloins at Costco are typically around 1 pound each Select a package based on the number of servings you need

  • Color – Opt for pork that is pinkish-red in color with white marbling fat. This indicates freshness Avoid any with dark spots.

  • Packaging – Costco pork comes vacuum sealed, which helps retain freshness. Make sure the packaging is intact.

  • Expiration date – Check that the use-by date allows enough time to cook and consume it

  • Ingredients – Costco pork contains just pork and minimal preservatives. Avoid any with artificial ingredients.

Getting the right tenderloin sets you up for success when it comes time to cook it.

Preparing and Seasoning the Pork

Before cooking, the pork needs some preparing:

  • Rinse – Rinse the tenderloin under cold water and pat dry completely with paper towels.

  • Trim – Use a sharp knife to trim off any excess fat or silver skin.

  • Score – Lightly score the surface with shallow diagonal cuts to help it absorb seasoning.

  • Season – Coat all over with olive oil, salt, pepper, and any other spices or herbs you want. Popular options are garlic, rosemary, thyme, paprika, and cumin.

  • Marinate (optional) – For extra flavor, let the seasoned tenderloin marinate in the fridge for 30 minutes up to overnight.

Proper seasoning and marinating ensures maximum flavor and tenderness.

Cooking Methods for Costco Pork Tenderloin

There are several excellent ways to cook Costco pork tenderloin. Here are some of the most popular methods:

Pan Searing

This method involves searing the pork on the stovetop to get a nice browned crust before finishing in the oven.

  • Heat an ovenproof skillet over medium-high heat and add a tablespoon of olive oil.

  • When the oil is hot, add the tenderloin and sear for 2-3 minutes per side until well browned.

  • Transfer the skillet to a 400°F oven and roast for 15-20 minutes until the internal temperature reaches 145°F.

  • Remove and let rest for 5 minutes before slicing to serve.

Oven Roasting

For an easy oven-cooked tenderloin:

  • Preheat oven to 400°F. Line a baking sheet with foil.

  • Place seasoned tenderloin on the baking sheet and roast for 25-30 minutes.

  • Flip halfway through cooking to brown evenly.

  • Roast until internal temperature reaches 145°F. Let rest before serving.

Grilling

Grilling imparts delicious smoky barbecue flavor:

  • Heat grill to medium-high. Oil grates to prevent sticking.

  • Grill tenderloin for 7-9 minutes per side with the lid closed.

  • Move to indirect heat if flare-ups occur.

  • Grill until internal temp hits 145°F. Tent with foil and let rest.

Sous Vide

For incredibly moist and tender pork, cook sous vide:

  • Season tenderloin and seal in a sous vide bag.

  • Cook at 140°F for 1-4 hours, until pasteurized.

  • Remove bag, pat dry, and sear in a hot skillet before serving.

Slow Cooker

Use a slow cooker for ultra-tender pulled pork:

  • Place seasoned tenderloin in a slow cooker and add chicken broth.

  • Cook on low heat for 7-8 hours until fall-apart tender.

  • Shred pork with two forks. Add barbecue sauce and serve on buns.

Checking Doneness

No matter which cooking method you use, it’s vital to accurately check the pork’s doneness temperature using an instant read meat thermometer.

  • Insert thermometer into the thickest part of the tenderloin, away from any bones.

  • Cook until it reaches an internal temperature of 145°F. At this point, the pork will be perfectly juicy and cooked through but still slightly pink inside.

  • If undercooked, return to heat for a few more minutes. If overcooked, the pork will be dry.

Once cooked, remove the pork from heat and tent loosely with foil. Letting it rest for 5-10 minutes allows the juices to redistribute evenly.

Serving and Meal Ideas

Costco pork tenderloin is incredibly versatile. Here are some tasty ways to serve it:

  • Sliced – Carve into medallions to serve with roasted potatoes and vegetables.

  • With sauce – Pair with a sauce like chimichurri, salsa verde, or gravy.

  • Tacos – Chop and use for tasty pork tacos along with lime, onion, cilantro.

  • Sandwiches – Thinly slice for sandwiches with pickles, mustard, and Swiss.

  • Salad topping – Dice up cold pork leftovers to top salads.

  • Breakfast – Make a hash with eggs, potatoes, onions, and diced pork.

With proper selection, preparation, cooking, doneness, and serving, you can enjoy incredibly delicious Costco pork tenderloin meals. Follow this guide for pork tenderloin perfection every time. Bon appetit!

Costco Pork Loin 3 epic ways

FAQ

Is it better to cook a pork tenderloin at 350 or 400?

2021• Tips & Tricks. First, you will want to preheat your oven to 400° F. You will end up lowering the heat later on but it is important to start at a high temp to trap the moisture inside the pork loin.

How long should I cook pork tenderloin at 400 degrees?

Bake at 400 degrees F until pork registers between 145- and 150-degrees F (63 and 65 degrees C) at the thickest part of the tenderloin, 15-25 minutes depending on thickness. This means the pork will be juicy and slightly pink in the middle.

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