01 - Preheat the oven to 400°F (200°F). Pat the chicken thighs dry and season both sides evenly with salt and black pepper.
02 - In a small bowl, combine cranberry sauce, Dijon mustard, and rosemary. Whisk until smooth and fully incorporated.
03 - Arrange chicken thighs, skin side up, on a baking sheet. Brush each thigh generously with the prepared cranberry glaze.
04 - Roast in the preheated oven for 35 to 40 minutes. Halfway through cooking, brush additional glaze over the chicken. Continue roasting until the skin is golden and an instant-read thermometer inserted into the thickest part registers 165°F (74°C).