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Arrange the chicken pieces in the pan so that all the pieces are skin-side up, and the largest pieces (the breasts) are in the center of the pan. Don't crowd the pan; allow room between the pieces. 3 Bake in the oven for 30 minutes at 400Â°F (205Â°C). This initial high heat will help brown the chicken. Then lower the heat to 350Â°F (175Â°C) and bake for and additional 10-30 minutes more until the juices run clear (not pink) when poked with a sharp knife or the internal temperature of the chicken breasts is 165Â°F (74Â°C) and of the thighs is 170Â°F (77Â°C).
You should bake 2 lbs. of chicken breasts in the oven at 350  degrees for one hour if the chicken is on the bone. If the chicken  is boneless it will take less time. Boneles â¦ s chicken will be done  in 30-40 minutes. 8 people found this useful.he temperatures and how long you should cook it are on the box. Place the chicken on slide aluminum foil on a cookie sheet. I generally bake mine at 350 degrees for 35-40 minutes and then cut at the thickest point to see if the juices run clear. If you bake too long it becomes too dry.