How Long To Roast Broccoli And Carrots At 400

Roasting broccoli and carrots at 400°F takes about 20 to 25 minutes total, depending on how big you cut them.
 
That’s the short answer if you’re rushing to get dinner going.
 
Broccoli florets usually need 15 to 20 minutes at 400°F, while carrots need a little longer, around 20 to 25 minutes, because they’re denser.
 
Since they cook at different rates, the trick is to give the carrots a head start before adding the broccoli to the pan.
 
If you’ve been wondering how long to roast broccoli and carrots at 400, you’re in the right place.
 
In this post, we’ll break down the exact roasting times, how to prep each veggie, and the little tricks that make roasted broccoli and carrots come out perfectly tender with crispy edges every time.
 
Let’s get into it.
 

How Long to Roast Broccoli and Carrots at 400°F

Roasting broccoli and carrots at 400°F is one of the easiest ways to get a flavorful side dish on the table, and the timing really comes down to the density of each vegetable.
 
Here’s how long each one needs when roasted at 400°F:
 

1. Broccoli Takes 15 to 20 Minutes

Broccoli florets roast fairly quickly at 400°F.
 
Small to medium florets will be tender with crispy, browned edges in about 15 to 20 minutes.
 
Larger florets may need closer to 20 to 22 minutes, so cut them evenly so they roast at the same rate.
 
Keep an eye on them after the 15-minute mark because broccoli can go from perfectly crisp to charred fast.
 

2. Carrots Take 20 to 25 Minutes

Carrots are denser than broccoli, so they need more time at 400°F, usually 20 to 25 minutes.
 
Sliced carrots about 1/4 inch thick will roast in roughly 20 to 22 minutes.
 
Thicker coins or whole baby carrots can take 25 to 30 minutes.
 
If you’re roasting carrots and broccoli together, cut the carrots smaller or par-roast them first.
 

3. Roasting Them Together? Give Carrots a Head Start

The best way to roast broccoli and carrots on the same sheet pan is to start the carrots first.
 
Roast the carrots alone for 8 to 10 minutes, then add the broccoli and roast everything for another 15 to 18 minutes.
 
That way, both vegetables finish at the same time, and nothing turns to mush or burns.
 
It’s a small extra step that makes a big difference in how the dish turns out.
 

How to Prep Broccoli and Carrots for Roasting at 400°F

Good prep is half the battle when roasting broccoli and carrots at 400°F.
 
Here’s how to set yourself up for success:
 

1. Cut Them Into Even Pieces

Even sizing is the secret to roasting broccoli and carrots evenly.
 
Cut broccoli into bite-sized florets and slice carrots into coins or sticks of similar thickness.
 
If the pieces are all roughly the same size, they’ll roast at the same rate and you won’t end up with some burnt and some raw.
 

2. Dry Them Thoroughly

Wet vegetables steam instead of roast, so pat the broccoli and carrots completely dry with a clean kitchen towel before tossing them in oil.
 
This one step is what separates crispy roasted broccoli and carrots from soggy ones.
 
It only takes a minute, but it makes a real difference.
 

3. Toss With Oil and Seasoning

Coat the vegetables in a couple of tablespoons of olive oil so every piece is lightly glossy.
 
Season with salt, pepper, and garlic powder, then spread everything in a single layer on the sheet pan.
 
Don’t crowd the pan, because overcrowding traps steam and keeps the broccoli and carrots from getting those crispy edges.
 

Tips for Perfect Roasted Broccoli and Carrots at 400°F

A few small tweaks can take your roasted broccoli and carrots from good to great.
 
Here’s what to keep in mind:
 

1. Preheat the Oven Fully

Always let your oven come all the way to 400°F before the pan goes in.
 
A fully preheated oven gives broccoli and carrots that immediate blast of heat they need to caramelize.
 
If you slide them into a cold oven, they’ll cook unevenly and lose that roasted texture.
 

2. Use the Middle Rack

The middle rack is the sweet spot for roasting broccoli and carrots at 400°F.
 
It gives them even heat from both above and below without scorching the tops.
 
If your oven runs hot, check the vegetables a few minutes early.
 

3. Flip Halfway Through

Give the pan a shake or flip the pieces with a spatula about halfway through roasting.
 
This helps the broccoli and carrots brown evenly on all sides.
 
It’s a quick step that keeps the bottoms from sticking or burning.
 

4. Watch the Broccoli Near the End

Broccoli florets have delicate tips that can char quickly, so check them around the 15-minute mark.
 
If the carrots need more time but the broccoli is done, just pull the broccoli off the pan and let the carrots finish.
 
A little char is tasty, but nobody wants blackened broccoli.
 

So, How Long to Roast Broccoli and Carrots at 400°F?

Roasting broccoli and carrots at 400°F takes about 20 to 25 minutes total, with broccoli needing 15 to 20 minutes and carrots needing 20 to 25 minutes.
 
Give the carrots a head start, cut everything evenly, and keep the pan uncrowded, and you’ll have perfectly roasted broccoli and carrots with crispy edges and tender centers.
 
Now you know exactly how long to roast broccoli and carrots at 400°F, so preheat that oven and get roasting.