Bisquick Zucchini Casserole


Bisquick Zucchini Casserole

You're going to love this zucchini bake with made with Bisquick.

Bisquick Zucchini Casserole
Bisquick Zucchini Casserole

You can never go wrong with an old-fashioned recipe from Grandma's recipe box. This classic Bisquick Zucchini Casserole is a recipe for quiche-like squares filled with zucchini, cheese, onion, herbs, and spices.

Since it's a recipe with Bisquick, it couldn't be easier to throw together. As a plus, you'll still get that comforting taste that will make you think fondly of days spent at Gran's house.

This easy zucchini casserole makes an irresistibly-good brunch, lunch or side dish recipe. It really doesn't matter what the occasion, this recipe is sure to be a hit. Bring the garden to your kitchen and dress it up with flavor. Zucchini is as versatile as ingredients come, so try it out at your next meal and see how quickly plates come back clean.

Serves18 people

Cooking Time30 min

Cooking Vessel Size9x13-inch casserole dish


  • 5 eggs, lightly beaten
  • 1/2 cup vegetable oil
  • 1/2 cup grated Cheddar cheese
  • 1/2 teaspoon salt
  • 1 teaspoon ground Italian spices (See note)
  • 3 cups thinly sliced zucchini
  • 1/2 cup finely chopped onion
  • teaspoon
  • 1 teaspoon finely minced garlic
  • 2 cups baking mix (i.e. Bisquick)


  1. Preheat oven to 350 degrees F and spray a 9x13-inch casserole dish with cooking spray.

  2. Whisk together the eggs, oil, cheese, salt, and spices. Add the zucchini and onion and toss to mix well. Add the baking mix and stir to combine until no dry mixture remains.

  3. Spoon into the prepared casserole and smooth the top. Bake for about 30 minutes, until the top is golden brown and puffy.

  4. Cut into squares to serve while warm or at room temperature.


  1. If you have a premixed bottle of Italian spices that is the thing to use. If not, make a mixture of dried oregano, basil, and rosemary and use 1 teaspoon of this mixture.

  2. This is a perfect dish to serve for brunch, as the centerpiece of lunch with a salad, or as a side dish at dinner.  It travels well and would work well for a potluck as it does not need to be piping hot to be enjoyed.

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We really enjoy vegetarian dishes and this one looks delicious. I Goooogled and found "what to use instead of Bisquick" (which is not available in South Africa) so we are all set! Zucchini, onion and cheese is a great combination so I am sure this is going to be a delicious dish.


Did you ever hear back what the missing ingredient (teaspoon) was? I see there are lots of comments on how great the recipe is but I do not see any answers to your question.

I am vegetarian and zucchini is one of my favorite vegetables so when I saw the picture of this in the newsletter, my first thought was, "please let it be meatless". Sure enough it was. I am definitely saving this one and would like to make it in the near future! It looks so delicious!

I'm definitely going to make this for my daughter who has told me that she has become a vegetarian. She has been living in Hong Kong for a long time and is coming home. I want to make her some of these as an easy snack when feeling peckish. She is coming home to stay whilst she gets settled again in her home country. I am trolling for all of the vegetarian recipes for her and everything is going to be made with tons of love!

This Baked with Love Zucchini Casserole is so delicious and versatile it is a must have recipe for your "go to" file. It is truly quick and easy to prepare, and it's packed with flavor. I have served this casserole as a main dish for brunch with a salad, as a side dish for dinner, I've brought it to pot luck functions, and I've even baked it into individual portions in a muffin tin to serve as an appetizer at parties. Have fun with this recipe.

What a great way to highlight and use up extra zucchini...I never know what to do with it and usually, end up giving it away. I've heard of zucchini bread and even cakes but this is something different for a nice change. Spicy sausage might even be a nice addition and compliment to this cheesy deliciousness if you're wanting something a little more hearty.

Zucchini is a firm favorite in our family so I am always on the lookout for new and interesting recipes and this one ticks all the boxes. We had a barbecue today and I tried this Grandmas Zucchini Squares recipes as an accompaniment. It disappeared so fast that I could tell it was as huge hit so will definitely be making it again.

I am so happy I found this recipe. I used to make this when I grew zucchini, but I've misplaced the recipe. I actually have a file of zucchini recipes, because when you grow zucchini, you end up with lots of them!

You zucchini can never have too many recipes. Has anyone tried using shredded zucchini instead of sliced. It seems like the zucchini would be more spread throughout the dish. Maybe I will try doing that. I love zucchini and cheese together. I'll add more cheese though.

I agree wholeheartedly with the others-I love this zucchini recipe! I always keep Bisquick in my pantry. I used a grated Asiago/Parm/Romano cheese for a bolder flavor and a bit more garlic and onion. It is a great way to use up your garden zucchini! I think this would make a good dish to take to a summer potluck. It can be eaten at room temperature and it's filling comfort food but getting your veggies, too, and it's inexpensive so you can feed a lot of people! Perfect!

I really liked these squares. They weren't at all "eggy" tasting and were just so soft and fluffy. If anything, I probably would've added more zucchini!

I enjoyed these a lot! A perfect combination of eggs and zucchini. I added some hot sauce, which gave it an extra kick!

These squares were so tasty! This would be a great recipe to make for a brunch because it tasted similar to a quiche. It had so much great flavor. Veggie lovers and haters will enjoy this!

This was excellent. It is a great way to eat your daily serving of veggies.

These were delicious, and I wish I had known about them sooner! I'm always looking for ways to use up my summer squash, and this will definitely be my go-to for something savory.

These were so good! The flavor reminded me a bit of some quiches I've had, and they were very light and fluffy.

I love how light and fluffy this casserole turns out, like a souffle. I think I'd add more cheese, since I really love cheese, but other than that - wouldn't change a thing!

I really liked this recipe. I would make it again in a heart beat.

This was a delicious recipe that would be perfect for Christmas morning breakfast. With a hint of flavor, it satisfies your taste buds without overwhelming them.

I thoroughly enjoyed these squares. They were perfectly fluffy with a great hint of cheese to them. If anything, though, I'd probably add a touch more of zucchini!

These zucchini squares were amazing! They were light, fluffy, and had a hint of delicious cheesy flavor. These would make a great side to serve with any dinner, especially if cooking for a crowd.

This recipe was delicious! It had just the right amount of seasoning and would make a great breakfast any day.


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