Tasty Roasted Butternut Squash and Zucchini

Fall vegetables have always been my go-to when I need a simple side dish that actually tastes good. There’s something so satisfying about cutting up whatever’s in season and letting the oven do all the work. Plus, my kids will eat roasted vegetables when they won’t touch them any other way.

That’s why this roasted butternut squash and zucchini combo has become a regular on our dinner table. The butternut squash gets sweet and tender, while the zucchini stays just firm enough to have some bite. I can prep everything while I’m already in the kitchen making the main course, so it doesn’t feel like extra work.

Want something that pairs with chicken? This works. Need a side for pasta night? Perfect. Honestly, I make this so often that I could probably cut the vegetables with my eyes closed.

What Kind of Butternut Squash Should I Use?

When picking out butternut squash at the store, look for one that feels heavy for its size and has a tan, matte skin without any soft spots or green patches. A medium-sized squash around 2-3 pounds is perfect for this recipe and will give you plenty of cubes to work with. You want the squash to have a long neck and smaller bulb at the bottom, as the neck portion has fewer seeds and more flesh to work with. If your squash feels really hard to cut, you can microwave it whole for 2-3 minutes to soften the skin slightly, making it much easier to peel and cube.

Options for Substitutions

This roasted veggie recipe is super forgiving and works well with lots of swaps:

• Butternut squash: You can easily swap butternut squash with other winter squashes like acorn, delicata, or kabocha. Sweet potatoes also work great and cook in about the same time.
• Zucchini: Yellow squash is the most obvious swap, but you could also use eggplant, bell peppers, or even thick slices of portobello mushrooms. Just keep the pieces similar in size for even cooking.
• Italian seasoning: No Italian seasoning? Mix equal parts dried basil, oregano, and marjoram, or just use whatever dried herbs you have on hand like basil or oregano alone.
• Olive oil: Avocado oil or vegetable oil work just as well for roasting. You could even use melted butter for extra richness.
• Dried herbs: Fresh herbs can replace dried ones – just use three times the amount (so 1.5 teaspoons fresh rosemary instead of 1/2 teaspoon dried). Add fresh herbs in the last 10 minutes of roasting to prevent burning.
• Garlic powder: Fresh minced garlic works too – use about 2-3 cloves. Toss it with the vegetables, but keep an eye on it since fresh garlic can burn more easily than powder.

Watch Out for These Mistakes While Roasting

The biggest mistake when roasting butternut squash and zucchini together is cutting them the same size, since butternut squash takes much longer to cook – cut your squash into smaller pieces (about 1/2 inch) and zucchini into larger chunks (about 1 inch) so they finish at the same time.

Another common error is overcrowding your baking sheet, which causes the vegetables to steam instead of roast and prevents that nice caramelized exterior from forming – use two pans if needed and make sure there’s space between each piece.

Don’t add the zucchini at the same time as the butternut squash either; give the squash a 15-20 minute head start, then add the zucchini for the final 20-25 minutes of cooking.

For extra flavor, try flipping the vegetables halfway through roasting and check that the butternut squash is fork-tender before removing from the oven, as undercooked squash can be tough and unpleasant to eat.

What to Serve With Roasted Butternut Squash and Zucchini?

This roasted veggie combo makes a perfect side dish for so many main courses! I love serving it alongside grilled chicken, pork tenderloin, or even a simple baked salmon since the herbs and garlic flavors complement protein really well. You can also toss the roasted vegetables over pasta with some parmesan cheese and a drizzle of olive oil for an easy weeknight dinner. For a heartier meal, try adding the roasted squash and zucchini to grain bowls with quinoa or farro, topped with some toasted nuts and a light vinaigrette.

Storage Instructions

Refrigerate: Your roasted butternut squash and zucchini will keep nicely in the fridge for up to 4 days in an airtight container. I love having this on hand because it makes such an easy side dish throughout the week. Just make sure to let it cool completely before putting it away.

Freeze: These roasted veggies freeze well for up to 3 months in freezer-safe containers or bags. The texture might be a bit softer after thawing, but they’re still great for adding to soups, grain bowls, or pasta dishes. I often freeze portions in meal-sized containers for quick dinners.

Warm Up: To enjoy your leftover roasted vegetables, you can eat them cold straight from the fridge or warm them up in the oven at 350°F for about 10 minutes. The microwave works too, but the oven helps bring back some of that nice roasted texture.

Preparation Time	15-20 minutes
Cooking Time	20-25 minutes
Total Time	35-45 minutes
Level of Difficulty	Easy

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 350-420
• Protein: 6-8 g
• Fat: 32-36 g
• Carbohydrates: 38-48 g

Ingredients

• 1 tsp Italian herb blend
• 1/4 tsp black pepper (freshly ground for best flavor)
• 1/2 tsp dried thyme
• 2 small zucchini (cut into 1/2-inch thick rounds)
• 1/2 tsp salt (fine sea salt is best for even coating)
• 3 tbsp olive oil (I like California Olive Ranch extra virgin olive oil)
• 1 medium butternut squash (peeled and cut into 1-inch cubes)
• 1/2 tsp dried rosemary (crushed between your fingers to release aroma)
• 1/2 tsp garlic powder

Step 1: Prepare the Oven and Sheet Pan

Preheat your oven to 425°F (220°C).

Lightly grease a sheet pan with a bit of olive oil or line it with parchment paper to prevent sticking, then set the pan aside.

Taking time to prep your baking surface helps ensure an evenly roasted result and easy cleanup.

Step 2: Peel and Cube the Butternut Squash

• 1 medium butternut squash (about 2 1/2 lb)

Carefully peel the butternut squash using a vegetable peeler.

For added stability, slice off the bottom so it sits flat on your cutting board.

Cut the squash in half, scoop out the seeds and innards, then cut the flesh into 1-inch cubes.

Place the cubes into a large bowl.

Step 3: Prepare the Zucchini and Season the Vegetables

• 2 small zucchini
• 3 tbsp olive oil
• 1 tsp Italian herb blend
• 1/2 tsp salt
• 1/2 tsp garlic powder
• 1/2 tsp dried rosemary
• 1/2 tsp dried thyme
• 1/4 tsp black pepper

Slice the zucchini into thick half moons and pat them dry on both sides with a towel to help them brown better when roasting.

Add the sliced zucchini to the bowl with the cubed butternut squash.

Drizzle over the olive oil, then add the salt, garlic powder, dried rosemary, dried thyme, black pepper, and Italian herb blend.

Toss everything thoroughly until all the vegetables are evenly coated with oil and seasonings.

I like to take a moment here to ensure every veggie has a nice even coating—this step really makes the flavors pop.

Step 4: Arrange and Roast the Vegetables

• seasoned butternut squash and zucchini from Step 3

Transfer the seasoned vegetables onto the prepared baking sheet, spreading them out into a single, even layer to prevent overcrowding (this helps with browning).

Roast in the preheated oven for 20 to 25 minutes, or until the butternut squash is fork-tender.

For extra caramelization and color, you can turn on the broiler during the last 2 to 3 minutes of cooking.

Watch closely during this step because the vegetables can brown quickly under the broiler.