Pat the chicken thighs completely dry with paper towels and sprinkle both sides with salt, pepper, and paprika. This matters because moisture on the skin prevents proper browning—I learned this lesson after my first rubbery batch. You'll see the seasoning stick to each piece instead of sliding off.
Heat olive oil in a large skillet over medium-high heat until it shimmers slightly, about 2 minutes. Add the chicken thighs skin-side down and sear for 5–6 minutes until the skin turns golden and crispy. Don't move them around; let the heat do the work. This is where the flavor foundation builds.
Flip each thigh carefully and sear the other side for 3–4 minutes, then transfer to a clean plate. The bottom won't look as golden, and that's okay—we're building layers of flavor here, not perfection.
Reduce heat to medium and add minced garlic to the same skillet, stirring constantly for 45 seconds. Add diced onion and cook for 2 minutes until softened. The garlic smell will hit you immediately, and that's your signal everything's on track.
Melt butter into the garlic-onion mixture, then add thyme and 1 cup chicken broth. Slide the lemon slices into the broth and nestle the seared chicken back into the pan skin-side up. This is the moment the cozy garlic butter chicken summer dish transforms from ingredients into something real.
Reduce heat to medium-low, cover partially with a lid, and simmer for 20–25 minutes until the chicken reaches 165°F internally. I check with a meat thermometer at the thickest part of the thigh. The broth will reduce slightly and coat everything with silky depth.
Remove from heat, scatter fresh parsley over the top, and let it rest for 3 minutes. This rest matters because it lets the juices settle back into the meat instead of running onto your plate when you cut in.