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Grilling zucchini and squash is a simple yet delicious way to bring out the natural flavors of these vegetables. Whether you’re hosting a summer BBQ or looking for a quick and healthy side dish, grilled zucchini and squash offer a smoky, slightly charred taste that complements a variety of dishes. Not only do they retain their natural nutrients, but grilling also adds a depth of flavor that roasting or steaming simply can’t match. This guide will walk you through everything you need to know about grilling zucchini and squash to perfection.
Choosing and Preparing the Vegetables
Selecting the Best Zucchini and Squash
To achieve the best results on the grill, it’s essential to start with fresh, firm vegetables. Look for zucchinis and squash that are:
- Medium-sized (about 6-8 inches long) to ensure they cook evenly.
- Free from bruises, soft spots, or blemishes.
- Firm to the touch, with vibrant skin and no wrinkling.
Avoid overly large zucchini and squash, as they tend to be watery and have a spongy texture that doesn’t hold up well to grilling.
Washing and Slicing
Before grilling, thoroughly wash the vegetables under running water and pat them dry with a paper towel. Next, slice them into even pieces to ensure uniform cooking. You can cut them in different ways depending on your preference:
- Rounds: Slice them into ½-inch thick discs for quick grilling and even charring.
- Lengthwise Strips: Cut them into long, thin slices, about ¼-inch thick, which makes flipping easier.
- Wedges: Quarter them lengthwise for a thicker, meatier bite.

Removing Excess Moisture
Zucchini and squash contain a lot of water, which can make them soggy when grilled. To avoid this, sprinkle them with a little salt and let them sit for 10-15 minutes. This process draws out excess moisture. Afterward, pat them dry with a paper towel before seasoning.
Seasoning and Marinating
While zucchini and squash have a mild, natural sweetness, seasoning enhances their flavor and makes them more versatile.
Basic Seasoning
For a simple yet delicious taste, coat the slices with:
- Olive oil – Prevents sticking and adds richness.
- Salt and black pepper – Enhances natural flavors.
- Garlic powder or minced garlic – Adds depth to the taste.
Enhancing with Herbs and Spices
If you want to add more flavor, try these combinations:
- Italian seasoning (oregano, basil, thyme, and rosemary)
- Paprika or smoked paprika for a subtle smoky kick
- Red pepper flakes for a bit of heat
- Lemon zest for brightness
Optional Marinades
Marinating zucchini and squash for 15-30 minutes can further enhance their taste. Try these marinades:
- Balsamic glaze and honey – Sweet and tangy combination
- Lemon-garlic mix – A fresh, zesty flavor
- Soy sauce and sesame oil – A hint of umami with a nutty aroma
Prepping the Grill
Before placing your zucchini and squash on the grill, ensure it’s properly preheated and prepared.
Gas vs. Charcoal Grill
- Gas Grill: Heats up quickly and provides even temperature control.
- Charcoal Grill: Adds a smoky flavor but requires more time to heat.
Preheating the Grill
Set your grill to medium-high heat (around 375-400°F). A properly heated grill ensures a nice char while keeping the vegetables tender.
Oiling the Grates
To prevent sticking, lightly brush the grill grates with vegetable oil using a heat-resistant brush or a folded paper towel dipped in oil.
Grilling Process
Arranging on the Grill
Place zucchini and squash slices directly on the grill grates in a single layer, leaving space between each piece to allow heat circulation.
Cooking Time and Flipping Technique
- Grill for 3-4 minutes per side, flipping once with tongs.
- Look for golden-brown grill marks before flipping.
- Avoid excessive flipping, as this can prevent proper caramelization.
Preventing Overcooking
Zucchini and squash cook quickly, so be careful not to leave them on too long. Overcooking results in mushy vegetables rather than firm, flavorful bites.
Serving Suggestions
Grilled zucchini and squash are versatile and pair well with many dishes. Here are some serving ideas:
As a Side Dish
- Serve alongside grilled chicken, steak, or fish.
- Pair with grilled tofu or mushrooms for a vegetarian option.
- Sprinkle with crumbled feta or parmesan cheese for added flavor.
In Salads and Sandwiches
- Chop grilled zucchini and squash into bite-sized pieces and toss them into salads.
- Layer them in sandwiches or wraps for a smoky, grilled touch.
- Add them to a grain bowl with quinoa, chickpeas, and fresh greens.
With Pasta and Rice
- Mix with cooked pasta, olive oil, garlic, and fresh basil.
- Serve over a bed of rice or couscous with grilled shrimp or chicken.
Tips and Variations
Using Skewers or Grill Baskets
If you have smaller pieces, thread them onto skewers or use a grill basket to prevent them from falling through the grates.
Mixing with Other Vegetables
Combine zucchini and squash with:
- Bell peppers
- Onions
- Mushrooms
- Cherry tomatoes
Making Grilled Vegetable Kebabs
Thread zucchini, squash, mushrooms, onions, and cherry tomatoes onto skewers, then grill them for a colorful and flavorful side dish.
Conclusion
Grilling zucchini and squash is an easy way to elevate these vegetables from simple ingredients to delicious, smoky bites. With the right preparation, seasoning, and grilling technique, you can create a healthy and flavorful dish that pairs well with a variety of meals. Whether you enjoy them as a side dish, in salads, or in hearty grain bowls, grilled zucchini and squash are sure to be a crowd-pleaser at your next BBQ. So fire up the grill and enjoy these tender, smoky delights.