Preheat your oven to 400°F (200°C).
Season the chicken thighs generously with salt and black pepper.
Heat the butter and olive oil in a Dutch oven or other heavy-bottomed oven-safe pot over medium-high heat.
Once the butter has melted and starts to foam, add the chicken thighs skin side down. Sear for 5-6 minutes or until golden brown, then flip and sear for another 3-4 minutes.
Remove the chicken thighs from the pot and set them aside on a plate.
Reduce the heat to medium and add the garlic cloves to the pot. Cook for 2-3 minutes or until fragrant.
Pour in the chicken broth, lemon juice, and thyme leaves. Stir well and bring the mixture to a simmer.
Return the chicken thighs to the pot, skin side up. Spoon the garlic-butter mixture over the chicken.
Transfer the pot to the preheated oven and bake for 25-30 minutes or until the chicken is cooked through.
Serve hot with lemon wedges on the side.