
Keto Chicken Breast in Brown Butter Walnut Rosemary Sauce with Radishes and Roasted Cauliflower
An original keto recipe featuring juicy golden chicken breast served with a silky brown butter, walnut, and rosemary sauce, paired with sautéed radishes and roasted cauliflower. Rich in flavor, low in carbs, and perfect for an elegant weeknight dinner.
Important notice: This recipe is not medical advice. Consult your healthcare professional.
Ingredients
- 4 600 g chicken breasts (skinless and boneless)
- 1 700 g cauliflower (en floretes small)
- 200 g radishes (cut por the mitad)
- 80 g butter (divided)
- 30 ml olive oil
- 50 g walnuts (chopped)
- 120 ml heavy cream
- 35 g grated Parmesan cheese
- 3 cloves garlic (chopped finely)
- 8 g fresh rosemary (chopped)
- 120 ml chicken broth
- 10 g Dijon mustard
- 6 g salt (or to taste)
- 2 g black pepper (freshly ground)
- 2 g smoked paprika
- 10 g fresh parsley (chopped for terminar)
Nutrition facts
per serving
Approximate nutritional information. Estimated from the recipe’s ingredients and amounts, using standard reference nutrition values. It may vary with brands, sizes and cooking method. For guidance only; not a substitute for medical or dietary advice.
Allergens
Instructions
- 1
Preheat the oven to 220 °C / 425 °F. Place the cauliflower on a sheet pan and toss it with 15 ml (1 tbsp) olive oil, 2 g (1/3 tsp) salt, 1 g (1/4 tsp) black pepper, and the smoked paprika. Roast for 22 to 25 minutes, until golden around the edges.
- 2
Season the chicken breasts on both sides with the remaining salt and black pepper.
- 3
Heat a large skillet over medium-high heat. Add 15 ml (1 tbsp) olive oil and 20 g (1.5 tbsp) butter. Sear the chicken breasts for 4 to 5 minutes per side, until well browned and they reach a safe internal temperature of 74 °C / 165 °F. Transfer to a plate and keep warm.
- 4
In the same skillet, add the radishes and sauté for 4 minutes. Stir in half of the minced garlic and cook 1 minute more. Remove the radishes and set aside.
- 5
Reduce the heat to medium. Add the remaining butter and cook until it turns nutty brown and fragrant, 2 to 3 minutes. Add the walnuts and toast for 1 minute, stirring constantly so they do not burn.
- 6
Add the remaining garlic, fresh rosemary, and Dijon mustard. Cook for 30 seconds. Pour in the chicken broth and scrape the bottom of the skillet to release the browned bits.
- 7
Add the heavy cream and cook for 2 to 3 minutes over medium-low heat until the sauce thickens slightly. Add the grated Parmesan cheese and stir until melted.
- 8
Return the chicken breasts and radishes to the skillet. Cook 2 minutes more, spooning the sauce over the chicken to blend the flavors.
- 9
Serve each portion with roasted cauliflower, one chicken breast, radishes, and plenty of sauce. Finish with fresh parsley on top.
Chef tips
For a deeper sauce, let the butter brown slowly without burning; it should smell like toasted nuts. If the chicken breasts are very thick, you can finish them in the oven at 190 °C / 375 °F for 5 to 8 minutes after searing.
Substitutions
You can swap the walnuts for pecans if you want a slightly sweeter flavor. Parmesan can be replaced with Grana Padano. If you do not have fresh rosemary, use 1 teaspoon dried rosemary.
What I used to make it
Generic kitchen tools that work for this recipe. You don’t need to buy anything to make it.
Illustrative imageNinja Professional BL610 Blender
Smoothies, sauces and soups
- Smoothies, sauces and soups
- Easy-to-wash jar
- Check the power and jar size
Illustrative imageCosori Pro LE 5 Qt Air Fryer
Browning and baking with little oil
- Browns food with very little oil
- Handy for vegetables, chicken and reheating
- Check the basket capacity
Illustrative imageTempPro TP19H Digital Thermometer
Checking doneness of meat and chicken
- Checks doneness of meat and chicken
- Quick reading
- Clean the probe after each use
As an Amazon Associate, I earn from qualifying purchases.
Ratings & reviews
Sign in to rate this recipe
Sign inRelated recipes

Keto Salmon Avocado Salad
27 min

Baked Eggs with Avocado
25 min

Keto Chicken Breasts Stuffed with Artichoke, Bacon and Fontina with Lemon Sage Butter
45 min

Keto Pork Tenderloin with Smoked Almond Crust and Rosemary Leek Cream
50 min

Keto Coconut Shrimp Skillet with Roasted Cauliflower and Lime
40 min

Creamy Keto Beef Skillet with Brussels Sprouts, Bacon, and Blue Cheese
45 min