How To Cook Squash On The Grill In Foil

You can cook squash on the grill in foil easily, and it’s one of the simplest ways to get tender, caramelized squash without losing it through the grill grates.
 
All you need is a sharp knife, some heavy-duty aluminum foil, a little oil, and your favorite seasonings.
 
Grilling squash in foil locks in moisture, steams the flesh until it’s soft, and lets the natural sugars char just enough for that smoky flavor.
 
Whether you’re working with butternut, acorn, zucchini, or delicata, cooking squash on the grill in foil works for basically any variety.
 
In this post, I’ll show you exactly how to cook squash on the grill in foil, plus a few tips to make it taste amazing every time.
 

Why Cook Squash on the Grill in Foil

When you cook squash on the grill in foil, you get the best of both worlds: steam and smoke.
 
The foil traps heat and moisture, so the squash steams from the inside while the bottom gets those lovely grill marks.
 
This method is especially great for firmer winter squash like butternut or acorn, which can take a while to soften.
 
Cooking squash on the grill in foil also means less mess and no sticking, and you can toss the foil when you’re done.
 
Plus, it’s a foolproof way to cook squash on the grill in foil even if you’re new to grilling.
 

1. Choose the Right Squash

You can cook almost any squash on the grill in foil, but some work better than others.
 
Butternut, acorn, kabocha, and delicata hold their shape well and get beautifully tender.
 
Zucchini and yellow squash cook faster, so you’ll want to slice them thicker or reduce the grilling time.
 
Summer squash like zucchini can also be cooked squash on the grill in foil with great results—just keep an eye on them.
 

2. Prep the Squash Properly

Start by washing and drying your squash.
 
If you’re using a hard-skinned squash, peel it or leave the skin on if you like the texture.
 
Cut the squash into cubes, slices, or halves—whatever size you prefer.
 
For even cooking when you cook squash on the grill in foil, aim for pieces that are about 1 inch thick.
 
Smaller pieces cook faster but can turn mushy, so keep them uniform.
 

3. Season Generously

Toss the squash pieces with olive oil, salt, pepper, and any herbs or spices you love.
 
Smoked paprika, garlic powder, and rosemary are fantastic with squash.
 
A little brown sugar or maple syrup can enhance the natural sweetness if you’re cooking squash on the grill in foil.
 
Don’t skip the oil—it helps the seasonings stick and prevents sticking to the foil.
 

4. Wrap It Up Right

Lay a large sheet of heavy-duty foil on your work surface.
 
Place the seasoned squash in the center.
 
Fold the foil over and seal the edges tightly to create a packet.
 
Leave a little room inside for steam to circulate, but make sure the packet is well sealed.
 
This is the key step when you cook squash on the grill in foil—if the packet leaks, you lose moisture and flavor.
 

How to Cook Squash on the Grill in Foil Step by Step

Now that your squash is prepped and wrapped, here’s exactly how to cook squash on the grill in foil.
 

1. Preheat the Grill

Preheat your grill to medium-high heat, around 400°F.
 
Make sure the grates are clean and lightly oiled to prevent sticking.
 
If you’re using a gas grill, close the lid and let it heat for 10 minutes.
 
For charcoal, wait until the coals are covered with ash and glowing.
 

2. Place the Foil Packet on the Grill

Put the foil packet directly on the grill grates.
 
Close the lid and cook for 20 to 30 minutes, depending on the squash type and size.
 
For zucchini or summer squash, start checking after 15 minutes.
 
For butternut or acorn, it may take 35 to 40 minutes.
 

3. Flip and Check for Doneness

After about 15 minutes, carefully flip the packet using tongs.
 
Be careful—steam will escape when you open it.
 
The squash is done when it’s fork-tender and slightly caramelized.
 
If it’s not quite there, reseal the foil and cook for another 5 to 10 minutes.
 

4. Add a Finishing Touch

Once your squash is tender, open the foil and let it sit for a minute.
 
You can sprinkle on some fresh herbs, a squeeze of lemon, or a drizzle of balsamic glaze.
 
If you want a bit of char, open the foil and place the squash directly on the grates for 2 to 3 minutes per side.
 
This step is optional but adds a nice smoky finish when you cook squash on the grill in foil.
 

Tips for Perfect Grilled Squash in Foil

Here are a few extra tips to make sure your squash turns out perfectly every time.
 

1. Don’t Overcrowd the Packet

If you pile too much squash into one foil packet, it will steam instead of roast.
 
Use multiple packets if needed so the squash has room to breathe.
 

2. Use Heavy-Duty Foil

Regular foil can tear, especially when flipping.
 
Heavy-duty foil holds up better and seals more securely.
 
You can also double-wrap with regular foil if that’s what you have.
 

3. Watch the Time

Cooking times vary based on squash type, piece size, and grill temperature.
 
Start checking early and adjust as needed.
 
The worst thing you can do is overcook squash until it turns to mush.
 

4. Experiment with Flavors

Try different seasonings each time you cook squash on the grill in foil.
 
Cumin and chili powder give it a Tex-Mex vibe.
 
Thyme and sage feel more rustic and cozy.
 
A little honey and cinnamon makes it taste like dessert.
 

So, How to Cook Squash on the Grill in Foil?

You can cook squash on the grill in foil by prepping the squash, seasoning it, sealing it in a foil packet, and grilling over medium-high heat until tender.
 
It’s a simple, foolproof method that works for almost any squash variety.
 
The foil traps steam and flavor, giving you soft, caramelized squash with minimal cleanup.
 
Whether you’re grilling zucchini on a weeknight or making butternut squash for a holiday side, this technique delivers.
 
So fire up the grill, grab your foil, and cook squash on the grill in foil tonight—you’ll love how easy and delicious it turns out.