8 large Bone-in, Skin-on Chicken Thighs
½ cup Dijon Mustard 124.5g
¼ cup Packed Brown Sugar 36.25g
¼ cup Red Wine Vinegar 59.75g
1 tsp Dry Mustard Powder 2g
1 tsp Salt 6g
1 tsp Freshly Ground Black Pepper 2.3g
½ tsp Ground Dried Chipotle Pepper 1.35g
1 pinch Cayenne Pepper, Or To Taste*
4 cloves Garlic, Minced 12g
1 Onion Sliced Into Rings 110g
2 tsp Vegetable Oil, Or As Needed 9g* Optional