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You can grill zucchini and summer squash easily, and the results are smoky, tender, and absolutely delicious.
Grilling zucchini and summer squash is one of the simplest ways to enjoy your summer harvest.
These tender summer vegetables soak up marinades beautifully and char perfectly on a hot grate.
If you’ve ever wondered how to grill zucchini and summer squash without turning them into a mushy mess, you’re in the right place.
The good news is that grilling zucchini and summer squash takes just minutes once you know the right technique.
In this post, we’ll walk through how to grill zucchini and summer squash step by step, plus seasoning ideas, common mistakes to avoid, and tips for getting those perfect grill marks every single time.
How to Grill Zucchini and Summer Squash Perfectly
Grilling zucchini and summer squash comes down to a few key moves that keep them firm on the inside and beautifully charred on the outside.
Here’s exactly how to grill zucchini and summer squash like a pro:
1. Choose Firm, Young Zucchini and Summer Squash
Start by picking zucchini and summer squash that are firm and heavy for their size.
Smaller squash hold their shape better on the grill, while oversized ones turn watery and soft.
Look for glossy skin with no soft spots, since those will break down fast over the flames.
2. Slice Them Into Thick, Even Pieces
When you grill zucchini and summer squash, thickness matters more than you’d think.
Cut them lengthwise into planks about half an inch thick, or slice into rounds of the same size.
Even slices cook at the same rate, so some pieces don’t burn while others stay raw.
3. Salt Them First to Remove Excess Water
Zucchini and summer squash are mostly water, which is why they can go soggy on the grill.
Sprinkle the slices with salt and let them sit for about fifteen minutes.
Then pat them dry with paper towels before they hit the grate.
This one step makes a huge difference when you grill zucchini and summer squash.
4. Toss Them in Oil and Seasonings
Brush or toss your slices with a light coat of olive oil so they don’t stick.
Then season with salt, pepper, garlic powder, or whatever blend you love.
A little oil also helps the zucchini and summer squash caramelize instead of steam.
5. Preheat the Grill to Medium-High Heat
A hot, clean grill is essential for grilling zucchini and summer squash.
Let your grill preheat for at least ten minutes, then scrape the grates clean.
Medium-high heat, around 375 to 450 degrees Fahrenheit, gives you char without burning.
6. Grill for Three to Four Minutes Per Side
Place the slices directly on the grate and leave them alone.
Grill zucchini and summer squash for three to four minutes, then flip once and cook the other side.
They’re done when they’re tender with crisp edges and clear grill marks.
Best Seasonings and Marinades for Grilled Zucchini and Summer Squash
Grilled zucchini and summer squash are blank canvases, so have fun with flavor.
Here are some favorites that pair well with these summer vegetables:
1. Simple Lemon and Herbs
Toss grilled zucchini and summer squash with lemon juice, olive oil, and fresh parsley or basil.
The bright acidity cuts through the smoky char beautifully.
2. Garlic Butter Glaze
Brush melted garlic butter over the slices right after they come off the grill.
It soaks in while they’re hot and makes every bite irresistible.
3. Balsamic and Honey Drizzle
A mix of balsamic vinegar and honey adds a sweet-tangy finish to grilled zucchini and summer squash.
Just drizzle it on after grilling so the sugars don’t burn.
4. Smoky Spice Rubs
Paprika, cumin, and chili powder give grilled zucchini and summer squash a bold, smoky kick.
Sprinkle the rub on before grilling and let the heat do its thing.
Common Mistakes to Avoid When Grilling Zucchini and Summer Squash
Even easy recipes can go wrong, so watch out for these pitfalls.
Avoid these mistakes when you grill zucchini and summer squash:
1. Slicing Them Too Thin
Paper-thin slices fall through the grates and turn to mush instantly.
Stick to half-inch thickness and your zucchini and summer squash will hold up fine.
2. Skipping the Salt-and-Dry Step
If you skip salting and drying, your squash will steam instead of char.
That extra moisture is the number one reason grilled zucchini and summer squash turn out limp.
3. Flipping Too Often
Every time you flip, you interrupt the sear.
Grill zucchini and summer squash with one flip only for the best char and texture.
4. Walking Away From the Grill
These vegetables cook fast and can burn in seconds.
Stay close while you grill zucchini and summer squash so you can pull them at the perfect moment.
5. Piling Them on the Plate
Stacking hot slices traps steam and softens the crust you worked for.
Lay grilled zucchini and summer squash in a single layer and serve them right away.
So, How Do You Grill Zucchini and Summer Squash?
You grill zucchini and summer squash by slicing them thick, salting and drying them, coating them in oil, and cooking them over medium-high heat for a few minutes per side.
It’s that simple, and the payoff is a smoky, tender side dish that steals the show at any cookout.
Now that you know how to grill zucchini and summer squash, grab a few fresh ones and fire up the grill.
Your summer dinners just got a whole lot tastier.