Preheat your oven to 200°C (400°F). While it heats, pat the chicken thighs dry with paper towels. You'll notice the skin feels slightly tacky rather than slippery, which helps the glaze adhere properly.

In a mixing bowl, combine the honey, wholegrain mustard, Dijon mustard, minced garlic, olive oil, apple cider vinegar, smoked paprika, black pepper, and salt. Stir until the mixture turns a uniform pale amber colour and you can smell the sharp, sweet aroma of the mustard and honey blending together.

Arrange the chicken thighs skin-side up in a 9x13 inch baking dish. Pour the honey mustard mixture over the top, using a brush or your hands to coat each piece evenly. The sauce should glisten wetly across the skin, pooling slightly around the edges of the dish.

Bake uncovered for 35-40 minutes. After 20 minutes, you'll hear a gentle sizzling sound as the fat begins to render. The kitchen will fill with a sweet, tangy scent that signals the glaze is caramelising. At 35 minutes, the skin should be deep golden brown and bubbling in spots.

Remove the dish from the oven and let it rest for 5 minutes. During this time, the juices redistribute within the meat, and the glaze thickens into a sticky coating. You'll see the sauce has reduced to a syrupy consistency around the thighs.

Garnish with fresh thyme sprigs if desired. The chicken should feel firm to the touch but yield slightly when pressed, and the internal temperature should read 74°C (165°F) on a meat thermometer. Serve immediately while the skin retains its crackling texture.