• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

The Kitchen Prep Blog

Easy Recipes with a Fresh Twist

  • Home
  • About Dianna
  • Recipe Index
  • Work With Me
    • Disclosure Policy
  • Contact
menu icon
go to homepage
subscribe
search icon
Homepage link
  • Home
  • Recipe Index
  • About Dianna
  • Work With Me
  • Contact
    • Facebook
    • Instagram
    • Pinterest
    • Twitter
  • ×
    Home » Main Dishes

    Cast Iron Pork Tenderloin

    Published: Nov 15, 2011 · Modified: Aug 1, 2023 by thekitchenprep · This post may contain affiliate links ·

    Jump to Recipe Print Recipe

    Cast Iron Pork Tenderloin! A simple mustard marinade adds tons of flavor to this crowd-pleasing pork tenderloin. Perfectly cooked on the inside with a cast iron-seared exterior, this makes a great weeknight dinner.

    How was your weekend? {Yes, I realize it's already Tuesday. Running a day late here!} Ours was great. We were actually in town all weekend long for the first time in heaven knows how long, so naturally, we did what any young, exciting couple would do: Nothing. 😛

    Ok, not nothing, nothing. We did do some stuff. Like make homemade French bread pizzas, drink wine, and watch free movies On Demand. We checked out a local craft show, stocked up on home essentials {read: about a zillion rolls of toilet paper} at Costco, and watched a LOT of football. Well, one of us did, anyway.

    And I attended my dear friend's second baby shower on Saturday. If you are under the age of about 28 or so, that may seem like a snooze of a weekend to you... but to us... it was just what the doctor ordered. {I know, I know. But trust me, you'll understand one day.}

    Last week was an interesting one for me. The universe decided to throw me a few curveballs and I am just doing my best to adjust to the changes {which, if you know me at all, you know is not always super easy for a control freak  person like myself.} 

    Regardless, I'm rolling with the punches and heeding my little sister's advice: "Keep calm and stuff your face with pumpkin bread." {A recipe I shall share with you soon!} Is it any wonder that we're related? 😉

    Meanwhile, the hubs and I are attempting a money-saving month, doing what we can to save our pennies. What does that mean? Well... No dining out {Which isn't too difficult since we usually only go out to eat once a week anyway}.

    No drinks and outings with friends. And no unnecessary spending {like visits to the frozen yogurt shop up the road that we are obsessed with}. That leaves us with resourceful meals at home and finding ways to entertain ourselves as inexpensively as possible. {Hence all the football watching.}

    When we threw our Oktoberfest party a few weeks ago, we bought 2 large packages of pork tenderloin from Costco, half of which was prepared and inhaled promptly the day of the party. The other half was put away to use for a mid-week dinner.

    While I thought I'd try something new with the remainder, I ended up using the exact same recipe that I used for the party at the husband's request because he enjoyed it so much. This mustard marinated cast iron pork tenderloin received rave reviews at the party, too {and I never got to try it}, so I figured there was no harm in making it again.

    If you're looking for an easy, mid-week meal with tons of flavor that you can pair with a variety of sides, this recipe is for you. Whisk the marinade together, throw in the tenderloin, refrigerate overnight & forget it until you're ready to cook. The result?

    A scrumptious dinner & a happy husband! {And wife.}

    Give it a try!

    Cast Iron Pork Tenderloin

    Dianna Muscari | The Kitchen Prep
    Cast Iron Pork Tenderloin! A simple mustard marinade adds tons of flavor to this crowd-pleasing pork tenderloin. Perfectly cooked on the inside with a cast iron-seared exterior, this makes a great weeknight dinner.
    Print Recipe Pin Recipe
    Prep Time 10 minutes mins
    Cook Time 30 minutes mins
    Marinating Time 8 hours hrs
    Course Main Course
    Cuisine American

    Ingredients
      

    • 1½ pound pork tenderloin
    • ¼ cup olive oil
    • ¼ cup Dijon mustard
    • 1 tablespoon grainy mustard
    • 2 tablespoons lemon juice
    • 2 cloves garlic minced
    • ½ teaspoon salt
    • ⅛ teaspoon pepper
    • 1 teaspoon dried oregano leaves

    Instructions
     

    • Trim the fat and silver skin off the pork tenderloin if necessary.
    • In shallow bowl, combine olive oil, mustard, grainy mustard, lemon juice, garlic, salt, pepper, and oregano and mix well. Add tenderloin and turn to coat.
    • Cover and marinated in refrigerator at least 8 hours.
    • When ready to cook, preheat oven to 450°F.
    • Heat a tablespoon of oil in a cast iron skillet over high heat on the stove top. When the oil is hot, place the pork tenderloin on the skillet. (Discard the marinade.) Allow it to sear on each side for a minute, turning to sear all the way around.
    • Place the skillet in the oven and reduce the heat to 350°F. Roast the pork tenderloin for 27-35 minutes or until a meat thermometer registers 155°F. (The time it takes will depend on the thickness of the tenderloin, so keep an eye on it.)
    • Remove the skillet from the oven. Tent with a piece of foil and let stand 10 minutes before slicing to serve.

    More Main Dishes

    • Pesto Gnocchi in a white bowl with a black and white striped kitchen towel underneath.
      Pesto Gnocchi
    • Portobello Mushroom Tacos
    • One Pot Jambalaya in a white dish with Mardi Gras beads surrounding it.
      One Pot Jambalaya
    • Close up of avocado pasta in a bowl with a fork in the center.
      Avocado Pasta

    Reader Interactions

    Comments

    1. E says

      December 09, 2011 at 3:20 pm

      Love your Grey Poupon photo! And the pork looks delicious too!

      Reply

    Leave a Reply Cancel reply

    Your email address will not be published. Required fields are marked *

    Recipe Rating




    Primary Sidebar

    Hi! I'm Dianna. I used to think cooking had to be complicated to be good, so I never considered it "my thing." Now I know that's far from true, and my mission is to create & share easy, mouthwatering recipes - from weeknight dinners to simple bites for entertaining - that anyone can make! Join me in my South Florida kitchen and let's get cooking!

    More about me →

    Popular

    • Fork and knife cutting into a stuffed cubanelle pepper.
      Stuffed Cubanelle Peppers
    • Benedictine Spread for Kentucky Derby in a white bowl with a piece of pumpernickel toast in the foreground slathered with spread.
      Benedictine Spread - A Derby Classic
    • Close up of Italian Knot Cookies on a white cake plate.
      Italian Knot Cookies
    • A large skillet filled with Creamy Mushroom & Chicken Sausage Florentine Pasta with a yellow and white striped dish towel underneath.
      Creamy Mushroom & Chicken Sausage Florentine Pasta

    Welcome!

    I'm Dianna and I've been creating & sharing easy recipes with a fresh twist for 14 years!

    More about me

    Popular

    • A large skillet filled with Creamy Mushroom & Chicken Sausage Florentine Pasta with a yellow and white striped dish towel underneath.
      Creamy Mushroom & Chicken Sausage Florentine Pasta
    • Moroccan-Spiced Vegetable Soup via The Kitchen Prep. An easy and flavorful meal for a cold day!
      Moroccan-Spiced Vegetable Soup with Couscous
    • Irish Cheddar & Cabbage Hash Brown Skillet on a dark green surface with a striped kitchen towel beside it.
      Irish Cheddar & Cabbage Hash Brown Skillet
    • A pavlova nest with coconut custard filling sprinkled with coconut flakes and drizzled with chocolate.
      Mini Pavlova Nests

    Seasonal

    • Orange-Avocado Salad
      Orange-Avocado Salad with Honey Vinaigrette
    • Sausage & Squash Soup in a white mug with ingredients around it.
      Sausage & Squash Soup
    • A stack of sweet corn and black bean fritters in a mini cast iron skillet with fresh sweet corn in the background.
      Sweet Corn & Black Bean Fritters
    • Vanilla Bean Citrus Bars! A crisp, shortbread crust is topped with a layer of sweet, citrusy filling speckled with fragrant vanilla beans. These are the stuff of potluck dreams!
      Vanilla Bean Citrus Bars
    • Email
    • Facebook
    • Instagram
    • Pinterest
    • RSS
    • Twitter

    Follow Me on Facebook

    Welcome!

    I'm Dianna and I've been creating & sharing easy recipes with a fresh twist for 14 years!

    More about me

    Popular

    • A large skillet filled with Creamy Mushroom & Chicken Sausage Florentine Pasta with a yellow and white striped dish towel underneath.
      Creamy Mushroom & Chicken Sausage Florentine Pasta
    • Moroccan-Spiced Vegetable Soup via The Kitchen Prep. An easy and flavorful meal for a cold day!
      Moroccan-Spiced Vegetable Soup with Couscous
    • Irish Cheddar & Cabbage Hash Brown Skillet on a dark green surface with a striped kitchen towel beside it.
      Irish Cheddar & Cabbage Hash Brown Skillet
    • A pavlova nest with coconut custard filling sprinkled with coconut flakes and drizzled with chocolate.
      Mini Pavlova Nests

    Seasonal

    • Orange-Avocado Salad
      Orange-Avocado Salad with Honey Vinaigrette
    • Sausage & Squash Soup in a white mug with ingredients around it.
      Sausage & Squash Soup
    • A stack of sweet corn and black bean fritters in a mini cast iron skillet with fresh sweet corn in the background.
      Sweet Corn & Black Bean Fritters
    • Vanilla Bean Citrus Bars! A crisp, shortbread crust is topped with a layer of sweet, citrusy filling speckled with fragrant vanilla beans. These are the stuff of potluck dreams!
      Vanilla Bean Citrus Bars

    Footer

    ↑ back to top

    About

    • Privacy Policy
    • Disclosure Policy

    Subscribe

    • Sign Up! and get recipes delivered to your inbox.

    Contact

    • Contact
    • Work with Me

    Copyright © 2025 · The Kitchen Prep ·