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How long to BBQ zucchini slices depends on their thickness, your grill temperature, and how tender or charred you like them.
As a general rule, zucchini slices take about 3 to 5 minutes per side over medium-high heat, so roughly 6 to 10 minutes total.
If you’ve been wondering how long to BBQ zucchini slices without turning them into mush, you’re in the right place.
Thin slices cook fast—sometimes in just 2 to 3 minutes per side—while thicker planks need closer to 5 to 6 minutes per side.
The good news is that zucchini is forgiving, so even if you BBQ zucchini slices a minute too long, they’ll still taste great with the right seasoning.
In this post, we’ll break down exactly how long to BBQ zucchini slices, plus tips for getting that perfect char without sogginess.
Let’s fire up the grill.
How Long to BBQ Zucchini Slices Based on Thickness
The answer to how long to BBQ zucchini slices really comes down to how thick you cut them.
Here’s a quick breakdown so you can nail the timing every single time you BBQ zucchini slices.
1. Thin Slices (1/8 to 1/4 inch)
Thin zucchini slices cook super fast, so you’ll only need about 2 to 3 minutes per side.
These are great for quick weeknight grilling when you want your BBQ zucchini slices ready in under 10 minutes.
Just watch them closely—thin slices can go from perfectly charred to burnt in seconds.
2. Medium Slices (1/4 to 1/2 inch)
This is the sweet spot for most people, and how long to BBQ zucchini slices at this thickness is around 3 to 5 minutes per side.
Medium slices hold their shape well, absorb marinades nicely, and give you that ideal tender-but-not-mushy bite.
If you’re grilling for a crowd, this is the thickness I’d recommend when you BBQ zucchini slices.
3. Thick Slices or Spears (1/2 inch to 1 inch)
Thicker cuts need more time—about 5 to 6 minutes per side—so total grill time lands around 10 to 12 minutes.
When you BBQ zucchini slices this thick, you get a meatier texture that pairs beautifully with steak or chicken.
Just keep the lid closed between flips to help them cook through evenly.
Factors That Affect How Long to BBQ Zucchini Slices
Thickness isn’t the only thing that decides how long to BBQ zucchini slices.
A few other factors can speed up or slow down your grill time.
1. Grill Temperature
Medium-high heat (around 375°F to 450°F) is ideal when you BBQ zucchini slices.
Too hot, and the outside burns before the inside softens.
Too low, and your zucchini slices steam instead of char, which means they’ll take longer and turn out limp.
2. Direct vs. Indirect Heat
Direct heat gives you those gorgeous grill marks and faster cooking when you BBQ zucchini slices.
Indirect heat is gentler and works well for thicker slices that need more time to cook through.
3. Oil and Marinade
A light coat of oil helps zucchini slices cook evenly and prevents sticking.
Marinades with sugar or honey can cause faster browning, so reduce the heat slightly when you BBQ zucchini slices that have been sitting in a sweet marinade.
4. Personal Preference
Some folks like their BBQ zucchini slices crisp with a bit of bite, while others want them fully soft.
How long to BBQ zucchini slices is ultimately up to your taste buds, so start with the lower time and add more as needed.
Tips for Perfectly Grilled Zucchini Slices
Now that you know how long to BBQ zucchini slices, here are a few tips to make them shine.
1. Slice Evenly
Uniform slices cook at the same rate, so you’re not pulling some off early while others are still raw.
This makes timing how long to BBQ zucchini slices way easier.
2. Pat Them Dry
Excess moisture leads to steaming, not grilling.
Pat your zucchini slices dry before seasoning so they char nicely when you BBQ zucchini slices.
3. Don’t Overcrowd the Grill
Give each slice its own space so heat circulates properly.
Crowding lowers the grill temperature and extends how long to BBQ zucchini slices.
4. Flip Only Once
Let each side get a good sear before flipping.
Constant flipping dries out your BBQ zucchini slices and messes with your timing.
5. Season After Grilling
A squeeze of lemon, a sprinkle of parmesan, or fresh herbs after grilling brightens up BBQ zucchini slices without burning the seasonings.
So, How Long to BBQ Zucchini Slices?
How long to BBQ zucchini slices comes down to 3 to 5 minutes per side for medium slices, 2 to 3 minutes for thin ones, and 5 to 6 minutes for thick cuts.
Keep your grill at medium-high heat, avoid overcrowding, and watch them closely the first time you BBQ zucchini slices.
Once you’ve done it a couple of times, you’ll know exactly how long to BBQ zucchini slices for that perfect char and tender bite.
Happy grilling.