Hello Laura,
For a 3.5-pound whole chicken, the ideal balance between crisp skin and juicy, tender meat comes from roasting at 400°F (200°C). At this temperature, a bird of that size typically takes between 50 and 60 minutes to cook through.
Here is a reliable breakdown to help you plan your evening:
1. Preparation: Pat the chicken thoroughly dry with paper towels before applying your oil or butter and seasonings. This removes surface moisture and helps the skin crisp up nicely.
2. Roasting: Place the chicken breast-side up in your baking dish and roast uncovered at 400°F for approximately 50 to 60 minutes.
3. Checking for doneness: Insert your meat thermometer into the thickest part of the inner thigh, making sure not to touch the bone. You are looking for a reading of 165°F (74°C). The breast meat should register at least 160°F to 165°F.
4. Resting: Once you remove it from the oven, allow the chicken to rest in the pan or on a cutting board for 10 to 15 minutes before carving. During this time, the juices will redistribute throughout the meat, and carryover cooking will bring the final temperature up perfectly.
All together, budgeting about 1 hour and 15 minutes from the moment it goes into the oven until it is ready to serve should fit well into your weeknight schedule.