How To Grill Summer Squash In Foil

You can grill summer squash in foil, and it’s one of the easiest ways to get tender, smoky, slightly sweet squash without babysitting a hot grate.
 
The foil locks in steam, keeps the squash from drying out, and lets you add butter, herbs, and aromatics that turn a simple vegetable into something you’ll want to make all summer long.
 
Whether you’re using zucchini, yellow squash, or pattypan, knowing how to grill summer squash in foil means you get consistent results every single time.
 
In this post, we’ll walk through how to grill summer squash in foil step by step, the best seasonings to use, and a few tricks that make the whole process foolproof.
 
Let’s get grilling.
 

How to Grill Summer Squash in Foil

Grilling summer squash in foil is about as simple as it gets, and here’s exactly how to do it.
 

1. Prep the Squash

Start by washing your summer squash and patting it dry.
 
Trim the ends, then slice the squash into rounds about half an inch thick.
 
You can also cut them into spears or half-moons if you prefer.
 
Just keep the pieces roughly the same size so they cook evenly.
 

2. Make the Foil Packet

Tear off a sheet of heavy-duty aluminum foil big enough to hold your squash in a single layer.
 
If you’re using regular foil, double it up for strength.
 
Place the squash in the center, then drizzle with olive oil and toss gently with your hands.
 

3. Add Seasoning and Butter

Season with salt, black pepper, garlic powder, and any dried herbs you love.
 
Add a few pats of butter or a drizzle of extra olive oil for richness.
 
A squeeze of lemon juice or a splash of soy sauce works wonders too.
 

4. Seal and Grill

Fold the foil over the squash and crimp the edges tightly to create a sealed packet.
 
Leave a little room inside for steam to build up.
 
Place the packet on a preheated grill over medium heat, around 375°F to 400°F.
 
Cook for 15 to 20 minutes, flipping the packet once halfway through.
 

5. Check for Doneness and Serve

Open the foil carefully since the steam is hot.
 
The squash should be fork-tender with a slight bite.
 
If it needs more time, reseal and grill a few extra minutes.
 
Finish with fresh herbs, a sprinkle of parmesan, or a squeeze of lemon before serving.
 

Why Grilling Summer Squash in Foil Works So Well

Grilling summer squash in foil works because the foil creates a mini steam oven right on your grill.
 
Here’s why that matters.
 

1. It Prevents Burning

Summer squash has a high water content and delicate skin, so direct heat can char it fast.
 
The foil shields the squash from the open flame while still letting it absorb smoky flavor.
 

2. It Keeps the Squash Moist

The sealed packet traps steam, so the squash stays tender instead of turning mushy or dry.
 
That’s why grilling summer squash in foil gives you a texture that’s soft but never soggy.
 

3. It’s Practically Foolproof

You don’t have to flip individual slices or worry about them falling through the grates.
 
Everything stays in one tidy packet, which makes cleanup a breeze.
 

4. It’s Endlessly Customizable

You can season grilled summer squash in foil however you like.
 
Try Italian herbs and parmesan, Mexican spices with lime, or Asian flavors with sesame oil and ginger.
 

Tips for the Best Grilled Summer Squash in Foil

These little tricks make a big difference when you grill summer squash in foil.
 

1. Don’t Overcrowd the Packet

Spread the squash in a single layer so every piece gets even heat.
 
If you’re cooking a lot, make two packets instead of one big pile.
 

2. Use Heavy-Duty Foil

Heavy-duty foil holds up better on the grill and won’t tear when you flip it.
 

3. Watch the Heat

Medium heat is your friend here.
 
Too hot and the squash steams too fast and turns soft, too low and it takes forever.
 

4. Add a Finishing Touch

A little lemon zest, fresh basil, or crumbled feta after grilling makes the squash taste restaurant-worthy.
 

5. Let It Rest Before Opening

Give the packet a minute off the heat before you open it.
 
The squash finishes cooking in that trapped steam.
 

So, How Do You Grill Summer Squash in Foil?

You grill summer squash in foil by slicing it, seasoning it, sealing it in a foil packet, and cooking it over medium heat for about 15 to 20 minutes.
 
It’s a simple, forgiving method that keeps the squash tender, flavorful, and perfectly cooked every time.
 
Whether you’re new to grilling or a seasoned pro, learning how to grill summer squash in foil gives you an easy side dish you can whip up all season.
 
So fire up the grill and give it a try.