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How to Grill Zucchini and Squash on a Charcoal Grill
To grill zucchini and squash on a charcoal grill, you need a hot, clean grate, a light coat of oil, and a watchful eye so the slices char without turning to mush.
It’s one of the easiest ways to get smoky, caramelized summer vegetables with almost no cleanup.
If you’ve been asking how to grill zucchini and squash on a charcoal grill without ending up with soggy, bland slices, you’re in the right place.
The charcoal adds a flavor boost that a gas grill just can’t match, so it’s worth learning the right technique.
In this post, we’ll walk through how to grill zucchini and squash on a charcoal grill step by step, plus seasoning ideas and common mistakes to avoid.
Let’s fire up those coals.
Why Grilling Zucchini and Squash on a Charcoal Grill Works So Well
Learning how to grill zucchini and squash on a charcoal grill is worth the effort because these vegetables were practically made for open fire.
Here’s why the charcoal method gives you such great results.
1. Charcoal Delivers Real Smoky Flavor
When you grill zucchini and squash on a charcoal grill, the burning coals release smoke that clings to the surface of the vegetables.
That smoke is what gives grilled zucchini and squash their deep, campfire-like taste.
A gas grill heats food, but charcoal actually flavors it, which is why so many backyard cooks prefer grilling zucchini and squash on a charcoal grill over any other method.
2. Zucchini and Squash Hold Up Great to High Heat
Zucchini and squash have a firm flesh that softens quickly but rarely falls apart when handled right.
That means you can grill zucchini and squash on a charcoal grill over fairly hot coals and get those beautiful grill marks without losing the shape of each slice.
Thicker planks of zucchini and squash work even better because they stay intact while the inside turns tender.
3. They Cook Fast, So Dinner Is Quick
Grilling zucchini and squash on a charcoal grill takes only about 8 to 12 minutes total.
That short cook time means you can grill zucchini and squash on a charcoal grill while the rest of your meal rests.
It’s the perfect side dish when you’re already firing up coals for burgers, chicken, or steak.
How to Grill Zucchini and Squash on a Charcoal Grill Step by Step
Now let’s get into the actual process of how to grill zucchini and squash on a charcoal grill from start to finish.
1. Prep the Zucchini and Squash
Start by washing your zucchini and squash, then trim off both ends.
Slice them lengthwise into planks about half an inch thick, or cut them into rounds if you prefer.
Lengthwise planks are easier to flip and less likely to slip through the grate when you grill zucchini and squash on a charcoal grill.
2. Oil and Season Generously
Brush every slice with olive oil so it won’t stick to the grate.
Then season with salt, pepper, garlic powder, or whatever blend you love.
A little oil and seasoning is all you need before you grill zucchini and squash on a charcoal grill.
3. Light Your Charcoal and Set Up Two Zones
Fill a chimney starter with charcoal and light it.
Once the coals are ashy gray, pour them onto one side of the grill to create a hot zone and a cooler zone.
This two-zone setup is the secret to controlling heat when you grill zucchini and squash on a charcoal grill.
4. Clean and Oil the Grate
Scrub the grate with a wire brush while it’s hot, then wipe it with an oiled paper towel.
A clean, oiled grate keeps your zucchini and squash from tearing when you flip them.
This small step makes a huge difference when you grill zucchini and squash on a charcoal grill.
5. Grill Over Direct Heat, Then Move to the Cool Side
Place the slices over the hot coals and let them sit undisturbed for 3 to 4 minutes.
Flip once, then move them to the cooler side if they’re browning too fast.
Close the lid and let them finish for another 3 to 4 minutes.
That’s really all there is to how to grill zucchini and squash on a charcoal grill perfectly.
6. Pull Them While They’re Still Slightly Firm
Zucchini and squash keep cooking after they leave the grill, so pull them a touch early.
They should be tender but not limp, with crisp edges and clear grill marks.
If you grill zucchini and squash on a charcoal grill past that point, they’ll turn mushy fast.
Tips for Perfectly Grilled Zucchini and Squash on a Charcoal Grill
A few extra pointers will help you nail this every single time.
1. Don’t Overcrowd the Grate
Leave space between each slice so steam can escape.
When you crowd the grate, you’re basically steaming the vegetables instead of grilling them.
Give every piece room to breathe when you grill zucchini and squash on a charcoal grill.
2. Finish With a Squeeze of Lemon or a Drizzle of Balsamic
A hit of acid brightens up the smoky flavor right after you grill zucchini and squash on a charcoal grill.
Lemon juice, balsamic glaze, or even a sprinkle of fresh herbs takes them to the next level.
3. Watch for Flare-Ups
Oil dripping onto hot coals can cause flare-ups that burn your zucchini and squash.
Keep a spray bottle of water nearby and move the slices to the cooler side if flames jump up.
So, How Do You Grill Zucchini and Squash on a Charcoal Grill?
You grill zucchini and squash on a charcoal grill by prepping thick slices, oiling and seasoning them, setting up a two-zone fire, and cooking them hot and fast over the coals.
The charcoal gives you that smoky char that makes grilled zucchini and squash taste like summer on a plate.
Just remember to keep the slices thick, the grate clean, and the cook time short.
Once you know how to grill zucchini and squash on a charcoal grill, it’ll become your go-to side dish all season long.
So grab your chimney starter and get those coals going.