Keto French Onion Chicken with Gruyère & Cauli Mash

About This Recipe

Caramelized-onion smothered chicken thighs, blanketed in melty Gruyère and served over buttery cauliflower mash. Cozy comfort food with a low-carb twist! This one-pan dinner keeps the classic French onion flavors while staying keto-friendly and halal-adaptable (use halal-certified chicken and broth).

Serves: 4  |  Prep: 15 minutes  |  Cook: 30 minutes

Ingredients

  • 4 bone-in, skin-on chicken thighs
  • 1 tbsp olive oil
  • 1 large yellow onion, thinly sliced (about 200 g)
  • 1 clove garlic, minced
  • 1 tsp garlic powder
  • 1–1.5 tsp dried thyme, divided
  • 1 cup beef broth (use halal-certified if needed)
  • 1 tsp balsamic vinegar or 1 tsp coconut aminos (for depth)
  • 4 oz (115 g) Gruyère cheese, shredded
  • 16 oz (454 g) riced cauliflower
  • 2 tbsp butter (or ghee), divided
  • 1.5 oz (42 g) cream cheese
  • 1 tbsp heavy cream
  • Kosher salt and black pepper, to taste
  • Fresh parsley, chopped, for garnish

Instructions

  1. Season the chicken: Preheat oven to 425°F (220°C). Pat chicken thighs dry. Season all over with salt, pepper, 1 tsp garlic powder, and 1 tsp dried thyme.
  2. Sear: Heat an oven-safe skillet over medium-high. Add olive oil, then place chicken skin-side down. Sear until deeply golden and much of the fat renders, 6–8 minutes. Flip, cook 2 minutes more, then transfer to a plate.
  3. Caramelize onions: Reduce heat to medium. Add 1 tbsp butter and the sliced onion with a pinch of salt. Cook, stirring often, until soft and caramelized, 12–15 minutes. Stir in minced garlic and the remaining thyme; cook 30 seconds.
  4. Deglaze: Pour in beef broth and balsamic (or coconut aminos). Scrape up browned bits and simmer 3–5 minutes until the liquid reduces slightly and turns glossy. Adjust salt and pepper.
  5. Cheese and bake: Nestle chicken back into the onions skin-side up with any juices. Top evenly with shredded Gruyère. Transfer skillet to the oven and bake 12–15 minutes, until chicken reaches 165°F (74°C). Broil 1–2 minutes to brown the cheese if desired.
  6. Make the mash: While the chicken bakes, steam or microwave the riced cauliflower until very tender. Drain excess moisture well, then mash with 1 tbsp butter, cream cheese, and heavy cream. Season with salt and pepper.
  7. Serve: Spoon cauliflower mash onto plates, top with a cheesy chicken thigh and plenty of onions and jus. Garnish with parsley and a few cracks of black pepper.

Keto Focus

This dish ditches flour-thickened sauces and potato sides. Cauliflower mash replaces potatoes, and the pan sauce is reduced naturally (no roux). Higher-fat chicken thighs and Gruyère boost satiety while keeping carbs low—about 7.7g net carbs per serving.

Nutrition Facts (per serving)

  • Calories: 633
  • Protein: 40g
  • Fat: 48g
  • Carbs: 10.8g
  • Fiber: 3.1g
  • Net Carbs: 7.7g

Tips & Variations

  • Cheese swap: Try Swiss, Emmental, or provolone if you can’t find Gruyère.
  • Thighs vs. breasts: Boneless skinless thighs or chicken breasts work—reduce bake time a few minutes to avoid overcooking.
  • Extra veg: Add sliced mushrooms with the onions or wilt a handful of spinach into the pan before baking.
  • Thicker sauce: Reduce longer, or whisk in a pinch of xanthan gum (about 1/8 tsp) off heat.
  • Halal-friendly: Use halal-certified chicken and beef broth; this recipe skips wine traditionally used in French onion.
  • Serve with: Garlicky green beans, a simple arugula salad, or roasted broccoli for a full low-carb plate.
  • Make-ahead: Caramelize onions up to 3 days ahead and refrigerate; rewarm before continuing.

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