Slow-Roasted Chicken Thighs with Caramelized Onions
Juicy chicken thighs slow-roasted with deeply golden onions and a hint of Dijon mustard for a comforting keto main course. This american-inspired chicken (keto) ready in about 45 minutes pairs bone-in skin-on chicken thighs, olive oil, medium, thinly sliced onion for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 200 calories and feeds 2, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 12 oz, bone-in skin-on chicken thighs
- 1 tbsp olive oil
- 1 medium, thinly sliced onion
- 2 cloves, minced garlic
- 1/2 tsp salt
- 1/4 tsp black pepper
- 1 tsp Dijon mustard
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Instructions
- Step 1: Preheat oven to 375°F (190°C). Pat chicken thighs dry and season with 1/2 tsp salt and 1/4 tsp black pepper.
- Step 2: Heat 1 tbsp olive oil in an oven-safe skillet over medium heat. Add sliced onions and cook for 8-10 minutes, stirring occasionally, until deeply golden and caramelized.
- Step 3: Push onions to edges of skillet, add chicken thighs skin-side down, and cook for 5 minutes until skin is golden. Flip thighs, cook 3 minutes, then add 2 minced garlic cloves and 1 tsp Dijon mustard. Transfer skillet to oven and roast for 20-25 minutes until chicken reaches 165°F (74°C) internally.
Frequently asked questions
How long does Slow-Roasted Chicken Thighs with Caramelized Onions take to make?
Total time is about 45 minutes (15 min prep + 30 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Slow-Roasted Chicken Thighs with Caramelized Onions?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep olive oil from drying out.
Can I substitute ingredients in Slow-Roasted Chicken Thighs with Caramelized Onions?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Slow-Roasted Chicken Thighs with Caramelized Onions for a different number of people?
The recipe is written for 2 servings. Multiply each ingredient by (your serving target / 2). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
Is Slow-Roasted Chicken Thighs with Caramelized Onions keto?
Yes — this recipe is tagged keto based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.
What others are saying
- ★★★★★
Restaurant quality! Can't believe how easy this was.
- ★★★★☆
Very good for a 30-minute recipe. Would bump up the spice level though.
- ★★★★☆
Reliable weeknight option. Not going to blow your mind but always satisfying.
