Baking frozen chicken thighs in oven to tender is possible and so delicious! This is how to cook thighs frozen bone-in or boneless skinless so it's moist with crispy skin.
How long to cook frozen bone-in chicken thighs in oven - Preheat the oven to 350 F. Place frozen chicken thighs in a baking dish, (they should not be overlapping, if so run under cool water to separate and lay in 1 layer) add rosemary. Brush with a little olive oil to keep the chicken from drying out in the oven.
Cover the baking dish with foil and place in the oven. Bake for 60 minutes -after this time, the thighs should be soft. However, if they are large, then the time can be increased to 80 minutes.
Remove the foil, brush your thighs with olive oil and sprinkle with spices and salt. Put in the oven uncovered for another 30 minutes or until thickest portion reaches 165 degrees and skin is browned and crisped.
How long to cook frozen boneless chicken thighs in oven - Put into preheated oven set to 375 degrees F. They will take closer to 50 min to 1 hour. Uncover during last 15 minutes to brown.
How to know when chicken thighs are done; If you pierce the thigh with a skewer, clear juices/fat will flow out. If it is pink, then increase the baking time by another 10 minutes. Use internal thermometer as a second check to ensure it is 165 inside.