To roast broccoli at 400°F, it generally takes about 15 to 25 minutes. Most recipes recommend roasting for around 20 minutes to achieve tender broccoli with crispy, slightly charred edges. The exact time depends on the size of the florets and personal preference for crispiness. It is usually advised to spread the broccoli in a single layer on a baking sheet with some olive oil and seasoning, without overcrowding the pan to allow even roasting. No flipping is typically needed during roasting. Summary of roasting broccoli at 400°F:

• Roast time: 15 to 25 minutes
• Recommended time: about 20 minutes
• Broccoli should be tender with crispy edges
• Spread evenly on a pan, cut into even pieces
• Toss with oil and seasoning before roasting

This ensures a flavorful and nicely roasted broccoli side dish every time.