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Keto Blue Cheese Crusted Filet 🥩

Cast Iron Keto
by
Updated:
3 Comments
4.80 from 5 votes

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Get ready for our Keto Blue Cheese Crusted Filet paired with mashed cauliflower and balsamic mushrooms. This recipe delivers pure indulgence without giving up on your health-conscious lifestyle. Enjoy tender filet mignon topped with divine blue cheese, alongside mashed cauliflower and zesty balsamic mushrooms. It's about to become your new favorite dish. So grab your apron, and let's jump into this incredible meal that will leave you relishing every bite.

Blue Cheese Crusted Filet with Mashed Cauliflower and Balsamic Mushrooms on a grey plate on wooden saucer with a fork on the plate and parsley and crumbled blue cheese in the background

This Keto Blue Cheese Crusted Filet with Mashed Cauliflower and Balsamic Mushrooms is sponsored by Castello Cheese. Thank you for supporting the brands that make CIK recipes possible. You can find Castello Cheese in your specialty cheese aisle. Search for a store near you here.

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Preparation and cooking overview

Sear the filet in a skillet to create a mouthwatering crust. Top each steak with blue cheese, pork rind crumbs, and aromatic herbs. Then broil until golden and irresistible. While the filets are cooking, prepare the creamy mashed cauliflower and sauté cremini mushrooms in a balsamic glaze. In just a little over 30 minutes, you'll have a low-carb steak dinner that's perfect for special occasions or those nights when you're craving pure satisfaction.

Chef's note

For an extra crunchy crust, add crushed almonds or pecans to the blue cheese mixture. Incorporating these nuts will not only enhance the texture but also infuse a subtle nutty flavor that complements the rich blue cheese. Whether you choose almonds or pecans, this simple addition can transform your dish, elevating it to a gourmet level.

  • Prep Time: 15 minutes
  • Cooking Time: 40 minutes
  • Total Time: 55 minutes
  • Difficulty Level: Easy
  • Recipe Makes 2 Servings

For more inspiration check out our Beef recipe.

🥩 Ingredients for this blue cheese crusted steak recipe

  • 2 6-ounce filets
  • 1 tablespoon unsalted butter
  • 1 shallot thinly sliced
  • 1 clove garlic minced
  • ¼ cup pork rind crumbs
  • 1 tablespoon fresh parsley minced
  • 3 ounces crumbled Castello Danish Blue Cheese
  • ¼ teaspoon salt
  • ⅛ teaspoon freshly ground black pepper

Mashed cauliflower

  • 2 tablespoons unsalted butter
  • 1 clove garlic
  • 10 ounces diced cauliflower florets
  • ½ cup heavy cream
  • Salt and pepper to taste

Mushrooms

  • 4 ounces cremini mushrooms thinly sliced
  • 1 tablespoon unsalted butter
  • 0.5 tablespoons balsamic vinegar
  • Salt and pepper to taste

Ingredient substitutions

  • Pork rind crumbs: If you can't find pork rind crumbs, use crushed pork rinds, almond flour, low-carb panko-style breadcrumbs, or crushed pork rind-style crackers as alternatives.
  • Balsamic vinegar: Use apple cider vinegar, red wine vinegar, or white balsamic vinegar as lower-carb alternatives.
  • Cremini mushrooms: Replace with white button mushrooms or shiitake mushrooms for a similar earthy flavor.

Additional ingredients

  • Avocado: Add sliced avocado to bring a creamy texture and boost the healthy fat content of the dish.
  • Herbs: Sprinkle chopped fresh herbs like thyme or rosemary to elevate the flavors and add a fragrant aroma to the recipe.
  • Lemon: Enhance the dish with a squeeze of fresh lemon juice to add brightness.
Blue Cheese Crusted Filet with Mashed Cauliflower and Balsamic Mushrooms on a grey plate on wooden saucer with a fork on the plate and parsley and crumbled blue cheese in the background

Cooking tools required

To make this steak with blue cheese recipe, you will need the following tools:

  • Cast-iron skillet (10" or larger)
  • Mixing bowl
  • Knife
  • Cutting board
  • Measuring spoons
  • Spatula or cooking utensils
  • Oven-safe skillet or pan for cooking mushrooms

Tools substitute options

  • Cast-iron skillet: If you don't have a cast-iron skillet, use a non-stick pan as an alternative. It will help prevent sticking and ensure even cooking throughout the recipe.

How to make Blue Cheese Crusted Steak: step-by-step guide

Cooking methods

  • Searing
  • Broiling
  • Sauteing
  • Boiling/Simmering

Preparation steps

  1. Gather and measure all the necessary ingredients for the recipe.
  2. Prepare the filets by seasoning them with salt and set them aside.
  3. Mince the fresh parsley and thinly slice the shallot and cremini mushrooms.
  4. Crush the pork rinds into crumbs if not already crushed.
  5. Dice the cauliflower florets and mince the garlic for mashed cauliflower.
  6. Prepare any optional ingredients like sliced avocado or fresh herbs.

Cooking instructions

  1. To make the mashed cauliflower, melt the butter in a 10" or larger cast-iron skillet over medium heat. Add the garlic and cook for 30 seconds until fragrant. Add the cauliflower and heavy cream. Cover and cook for 10 minutes until soft. Transfer the cauliflower, minus any leftover liquid, to a blender or food processor, or use an immersion blender to puree the mixture until smooth. Add in a bit of the leftover liquid to thin, if needed. Season liberally with salt and pepper, to taste. Transfer the mashed cauliflower to a bowl and set it someplace warm. Wipe out the skillet.
  2. Season the filets with salt on both sides. In a medium bowl, combine the minced herbs, Castello Danish Blue, pork rind crumbs, salt, and pepper, and set aside.
  3. Heat 1 tablespoon of butter in the skillet over medium heat. Add in the shallots and cook for 5 minutes until softened. Add in the garlic and cook for another minute. Transfer to the bowl with the blue cheese mixture. Wipe out the skillet.
  4. Preheat the oven broiler to high. Heat the avocado oil in the skillet over medium-high heat and sear the steaks for 5-7 minutes per side.
  5. Top each steak with the blue cheese mixture and transfer to the oven. Broil for 5 minutes until the crust is golden. This will result in a medium-rare filet. Remove from oven and let rest while you make the mushrooms.
  6. Without wiping out the skillet, add the butter to the pan over medium heat. Add the mushrooms and cook for 5-7 minutes, until soft. Deglaze the pan with the balsamic vinegar and season to taste.
  7. To serve, divide the cauliflower between two plates. Top with mushrooms and steak. Serve immediately.

Chef's pro tip

One frequent error when broiling the filets is cooking them too long, which can lead to a well-done steak rather than the sought-after medium-rare with a warm red center. To avoid this, carefully watch the filets and look for the golden crust as a sign that they're cooked just right. If a medium-rare steak is what you're aiming for, be sure to take them out of the oven promptly to prevent them from overcooking.

Blue Cheese Crusted Filet with Mashed Cauliflower and Balsamic Mushrooms on a grey plate on wooden saucer with a fork on the plate and parsley and crumbled blue cheese in the background

What to serve with blue cheese-crusted steak

  • Grilled asparagus spears: Tender and flavorful, grilled asparagus complements the steak perfectly with its smoky char and delightful crunch.
  • Roasted Brussels sprouts: Roasting brings natural sweetness and a delightful crunch to these nutritious sprouts, pairing well with the savory blue cheese crust. Try these Keto Brussels Sprouts with Mayo or these simple Brussels Sprouts with Bacon.
  • Sautéed spinach with garlic: Quick and easy, sautéed spinach with garlic provides a nutritious and flavorful side dish that adds freshness and depth to the meal.
  • Creamy coleslaw with a vinegar-based dressing: This tangy and crunchy coleslaw offers a refreshing contrast to the rich flavors of the steak and enhances its overall enjoyment. We made something perfect with our Crackslaw!
  • Mixed greens salad with a keto-friendly dressing: A vibrant salad made with mixed greens and a keto-friendly dressing adds freshness and variety to the plate, complementing the flavors of the blue cheese-crusted filet. For a zesty touch, try our Keto Arugula Salad.

How to make it healthier

  • Opt for grass-fed beef.
  • Use organic ingredients: Select organic ingredients for the recipe, including cauliflower, mushrooms, and herbs.
  • Increase vegetable portions: Boost the meal's nutritional value by increasing the portion of mashed cauliflower and mushrooms. These low-carb and nutrient-rich sides help increase fiber intake and add more vitamins and minerals to the dish.
  • Replace heavy cream: Swap the heavy cream in the mashed cauliflower with a lighter alternative, like unsweetened almond milk or coconut milk. This modification lowers the calorie and saturated fat content while maintaining a creamy texture.

Time-saving tips

  • Purchase pre-sliced cremini mushrooms or pre-washed and sliced mushrooms.
  • Make a larger batch of mashed cauliflower and refrigerate the leftovers for future meals. You can enjoy a ready-to-heat side dish.
  • Use frozen cauliflower florets instead of fresh ones.
  • Instead of manually mashing the cauliflower, use a blender or food processor for quicker and smoother results.
Blue Cheese Crusted Filet with Mashed Cauliflower and Balsamic Mushrooms on a grey plate on wooden saucer with a fork on the plate and parsley and crumbled blue cheese in the background

What can I prepare ahead of time?

  • Prepare the mashed cauliflower a day ahead and refrigerate it. This way, when it's time to cook, you can reheat it on the stovetop while the steaks are broiling, saving you from cooking it from scratch.
  • Pre-measure and mix the seasonings for the blue cheese crust and steak. Combine the minced herbs, salt, and pepper in a small bowl or container so you can sprinkle the pre-mixed seasoning blend over them when it's time to season the filets.

Storage and reheating instructions

Storage instructions

  • Store cooked steak, mashed cauliflower, and balsamic mushrooms separately in airtight containers.
  • Refrigerate leftovers within 2 hours and consume within 3-4 days.
  • Do not freeze the leftovers for optimal taste and texture.

Reheating instructions

  • Reheat the steak in the oven at 350°F (180°C) for 8-10 minutes.
  • Microwave mashed cauliflower on high power in a covered, microwave-safe bowl for 1-2 minutes.
  • Heat balsamic mushrooms in a skillet over medium heat for 3-4 minutes.

Recipe wrap-up and conclusion

Savor a plateful of keto bliss ready to tantalize your taste buds and support your commitment to a healthy lifestyle. Blue Cheese Crusted Filet mignon with mushrooms and mashed cauliflower will soon become your favorite.

Craft this keto masterpiece in your kitchen and share it with your friends and family. Devour each bite of tender steak, blue cheese crust, and savory balsamic mushrooms, all served alongside creamy mashed cauliflower. It's time to take your keto cooking to the next level and enjoy a memorable dining experience. Happy cooking and bon appétit!

Frequently asked questions

Yes, blue cheese is generally considered keto-friendly. It is low in carbohydrates and high in fat, making it a suitable choice for a keto diet.

To make a blue cheese-crusted steak, season your steak with salt and pepper. In a bowl, combine minced herbs, blue cheese, pork rind crumbs, salt, and pepper. Sear the steak in a skillet and top it with the blue cheese mixture. Finish cooking the steak in the oven under the broiler until the crust turns golden. Rest the steak before serving.

This recipe is primarily designed for meat lovers, but you can try making a vegetarian version by using grilled portobello mushrooms or a plant-based protein alternative instead of steak.

📖 Recipe

Blue Cheese Crusted Filet with Mashed Cauliflower and Balsamic Mushrooms on a grey plate on wooden saucer with a fork on the plate and parsley and crumbled blue cheese in the background

Blue Cheese Crusted Filet with Mashed Cauliflower and Balsamic Mushrooms

This Keto Blue Cheese Crusted Filet with Mashed Cauliflower and Balsamic Mushrooms is a great low-carb steak dinner for 2!
4.80 from 5 votes
Print Rate Pin Recipe
Course: Main Course
Cuisine: American
Keyword: keto steak dinner
Prep Time: 15 minutes
Cook Time: 40 minutes
Total Time: 55 minutes
Servings: 2
Calories: 644kcal

Ingredients

  • 2 6-oz filets
  • 1 tablespoon unsalted butter
  • 1 shallot thinly sliced
  • 1 clove garlic minced
  • ¼ cup pork rind crumbs 0.5-oz
  • 1 tablespoon fresh parsley minced
  • 3 ounces crumbled Castello Danish Blue Cheese
  • ¼ teaspoon salt
  • ⅛ teaspoon freshly ground black pepper

Mashed Cauliflower:

  • 2 tablespoons unsalted butter
  • 1 clove garlic
  • 10 ounces diced cauliflower florets
  • ½ cup heavy cream
  • Salt and pepper to taste

Mushrooms:

  • 4 ounces cremini mushrooms thinly sliced
  • 1 tablespoon unsalted butter
  • .5 tablespoon balsamic vinegar
  • Salt and pepper to taste
US Customary - Metric

Instructions

  • To make the mashed cauliflower, melt the butter in a 10” or larger cast-iron skillet over medium heat. Add the garlic and cook for 30 seconds until fragrant. Add the cauliflower and heavy cream. Cover and cook for 10 minutes until soft. Transfer the cauliflower, minus any leftover liquid, to a blender, food processor or use an immersion blender to puree the mixture until smooth. Add in a bit of the leftover liquid to thin, if needed. Season liberally with salt and pepper, to taste. Transfer the mashed cauliflower to a bowl and set someplace warm. Wipe out the skillet.
  • Season the filets with salt on both sides. In a medium bowl, combine the minced herbs, Castello Danish Blue, pork rind crumbs, salt, and pepper, set aside.
  • Heat 1 tablespoon of butter in the skillet over medium heat. Add in the shallots and cook for 5 minutes until softened. Add in the garlic and cook for another minute. Transfer to the bowl with the blue cheese mixture. Wipe out the skillet.
  • Preheat the oven broiler to high. Heat the avocado oil in the skillet over medium-high heat and sear the steaks for 5-7 minutes per side.
  • Top each steak with the blue cheese mixture and transfer to the oven. Broil for 5 minutes until the crust is golden. This will result in a medium-rare filet. Remove from oven and let rest while you make the mushrooms.
  • Without wiping out the skillet, add the butter to the pan over medium heat. Add the mushrooms and cook for 5-7 minutes, until soft. Deglaze the pan with the balsamic vinegar and season to taste.
  • To serve, divide the cauliflower between two plates. Top with mushrooms and steak. Serve immediately.

Nutrition

Nutrition Facts
Blue Cheese Crusted Filet with Mashed Cauliflower and Balsamic Mushrooms
Amount Per Serving
Calories 644 Calories from Fat 531
% Daily Value*
Fat 59g91%
Saturated Fat 37g231%
Cholesterol 178mg59%
Sodium 1024mg45%
Potassium 873mg25%
Carbohydrates 13g4%
Fiber 4g17%
Sugar 6g7%
Protein 18g36%
Vitamin A 2067IU41%
Vitamin C 73mg88%
Calcium 305mg31%
Iron 1mg6%
*

Nutritional values are estimates only and do not include carbs from sugar alcohols.

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Reader Interactions

Comments

  1. Jedidja says

    5 stars
    This looks amazing! Can't wait to try it for my wife's birthday 🙂

    One question regarding the steaks - in the post it says "We started the steak in the cast-iron skillet, getting a nice seared crust and cooking most of the way through" but in the instructions, I can only see putting the steaks directly in the oven. Am I missing something? I'm guessing sear for a few minutes on each side?

    Reply

    • Cast Iron Keto says

      Hi! Yes, step 4 in the instructions have you searing the steaks over medium-high for 5-7 minutes per side before transferring to the oven.

      Reply

      • Jedidja says

        5 stars
        I don't know how I missed that the first time 🙂 This turned out really well!

        My oven's broiler must be a bit on the hot side. For 7oz steaks and the rack in the second highest position, five minutes on high made the steaks turn out medium well. Easy enough to fix next time 🙂

        Reply
4.80 from 5 votes (3 ratings without comment)

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