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This Cajun Pork Tenderloin hails from our friend Diane Sanfilippo‘s newest book Keto Quick Start, which is part textbook on everything you need to know on the why and how to get started on a ketogenic diet, and part delicious cookbook! It’s the ultimate resource for everything keto but is also filled with amazing recipes like this quick and flavorful Cajun Pork Tenderloin. This easy pork tenderloin recipe pairs so well with essentially any side dish, and will be a great weeknight meal!

Easy Pork Tenderloin RecipeCajun Pork Tenderloin

Today’s recipe comes to you from my friend Diane’s newest book: Keto Quick Start: A Beginner’s Guide to a Whole-Foods Ketogenic Diet. It has over 100 keto recipes, four weekly meal plans, more than a dozen easy meal ideas (no recipe required!), and troubleshooting tips and tricks. It also features a unique and easy-to-use template that makes tracking your food quick and simple.

Why we love this book: Keto Quick Start targets everyday real-world concerns such as what to expect in the first few weeks and how to know if you’re on the right track, how to determine if you need more carbs and how to incorporate those carbs in a healthy way, how to customize keto for your personal goals (especially weight loss), and things to be aware of if you’re concerned about a particular health issue.

If you are at all curious about the keto diet and the possibly benefits it could have on your life you need to own this book. We’re lucky to live in a world where there is a wealth of information about the different ways we can nourish our bodies to make us feel our best, and Diane’s newest book is a shining example of that. Pick up your copy of Keto Quick Start here!

We are also hosting a giveaway of Keto Quick Start over in this post, so go check that out and enter!

Keto pork tenderloin

And let’s talk about this Cajun Pork Tenderloin! Like a lot of recipes in Keto Quick Start, this one isn’t overly complicated, utilities pantry staples like dried spices and is so delicious! It’s a unique take on the typical mustard and pork combo and pairs so well with most veggies for an easy weeknight dinner. It utilizes a quick sear on the stove top, and then it finishes cooking in the oven.

What to serve with this pork tenderloin:

Pork tenderloin keto

Slice into the thickest part of the loin and check that the tenderloin is pale with juices running from the cut. Look for meat that is mostly white with a slight hint of pale pink. We also love our kitchen BFF, the Thermapen! The pork is done at a temperature of 145ºF.

Keto pork tenderloin recipe

If you like this keto recipe, check out these others:

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Want more information on the keto diet, who it’s for, what it is, and more? Read this Keto 101 post here!

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Cajun Pork Tenderloin (Keto)

5 from 2 votes
Servings 4
Prep Time 5 minutes
Cook Time 20 minutes
Total Time 25 minutes


  • 2 tablespoons Cajun Spice Blend see below
  • 2 tablespoons Dijon mustard
  • 2 tablespoons ghee
  • 2 pork tenderloins 1 1/2 to 2 pounds total
  • Coarse sea salt for garnish


  • Preheat the oven to 375°F.
  • In a small mixing bowl, combine the spice blend, mustard, and ghee. Brush the mixture evenly onto the pork tenderloins.
  • Place a large cast-iron or other oven-safe skillet on the stovetop over medium-high heat.
  • When the pan is hot, sear the tenderloins on both sides until lightly browned, about 2 minutes per side.
  • Transfer the pan to the oven and roast the tenderloins for 15 to 20 minutes, until the internal temperature of the pork reaches at least 145°F. Garnish with coarse sea salt before serving.


To make the cajun spice blend mix all of the ingredients in a bowl:
2 teaspoons dried oregano
2 teaspoons paprika
½ teaspoon granulated garlic
½ teaspoon granulated onion
½ teaspoon sea salt
½ teaspoon ground black pepper
½ teaspoon dried thyme leaves
Pinch cayenne pepper


Serving: 4gCalories: 403kcalCarbohydrates: 0.4gProtein: 51.2gFat: 20.5gSaturated Fat: 9gCholesterol: 176mgSodium: 258mgFiber: 0.3gSugar: 0.1g
Author: Lexi

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Recipe Rating


  1. 5 stars
    It looks amazing! I only know 1 or 2 pork recipes, and this is something I really would love to try. Saved it on my phone to make on next weekend dinner. I would love to have it with mint chutney.