Light & Tasty Zucchini Casserole

Alright, let’s talk about this casserole.


I told you guys last night about this thing and I promised you all a recipe, so today’s the day.

If any of you are in the same boat as I am with an abundance of zucchini, then this is absolutely a recipe for you. If you’re not on that boat, well then go head out and buy some ASAP. This is not a recipe to miss.


Jay was a little skeptical of this beauty yesterday – he’s not easily swooned by veggies like I am – but after one bite, he was just as hooked as I was. We were trying to figure out what it reminded us of while eating it, and we decided that it sort of reminded us of a light, cheesy hash brown casserole…except with zucchini.

My favorite part was definitely the crispy edges.


I definitely think you guys are gonna love this one. Smile


Light & Tasty Zucchini Casserole

(adapted from Eat More of What You Love cookbook)


  • 1 teaspoon olive oil
  • 3 teaspoons butter, divided
  • 6 cups coarsely grated zucchini
  • 1 cup chopped onion
  • 1/2 cup chopped peppers
  • 1 tbsp flour
  • 1 cup low-fat evaporated milk*
  • 1 tsp Dijon mustard
  • 1/2 tsp garlic powder
  • 1/4 tsp salt
  • 1/8 tsp black pepper
  • 3/4 cup shredded reduced-fat sharp cheddar cheese
  • 2 large egg whites
  • 1/4 cup panko breadcrumbs

*I didn’t have evaporated milk on hand, so I substituted with 2/3 cup non-fat dry milk + 3/4 cup water. Regular milk is not recommended.


  1. Preheat oven to 400 degrees F. Lightly spray a 9×9 baking dish with cooking spray.
  2. In a large skillet, heat olive oil over medium heat. Add zucchini, onion, and peppers and cook for 10-15 minutes or until the liquids have evaporated. Transfer to a bowl and set aside.
  3. Add 2 teaspoons of butter to skillet over medium heat. Add flour and cook for 1 minute, stirring constantly. Add milk, Dijon, garlic powder, salt, and pepper and whisk until mixture thickens, about 4-5 minutes. Remove from heat and stir in cheese until blended. Pour over zucchini mixture, stir, and set aside.
  4. In a small bowl, beat egg whites until soft peaks form. Gently fold egg whites into zucchini mixture, then pour mixture into prepared baking dish. Melt the remaining teaspoon of butter, combine with panko breadcrumbs, and sprinkle on top of casserole.
  5. Bake for 35-40 minutes or until heated through. Enjoy!



  1. Amy says

    Wow this looks DELICIOUS! My friend’s dad makes a version of this but it’s definitely full-fat. This looks like a fabulous alternative!!

  2. Jill says

    I want to like this, I really do! For whatever reason, the ‘ol Z & I are not friends :( Well… mostly because I can’t take the texture of it I think? Which is a total bummer because every what appears to be amazing summer recipe includes Zucchini, and I end up missing out :( Any suggestions on Summery recipes that pairs well with the grill & don’t involve Zucchini? Though I’m sure this one is amazing… If… only… lol :)

    • Courtney says

      Evaporated milk has some of the water taken out of it so it’s a bit thicker of a consistency. Regular milk would probably not allow the casserole to set as well.

  3. says

    Thank you SO much for this recipe. I made this casserole for the first time last weekend and just made another one last night. My mother and I love it! I didn’t put any onions, peppers, or garlic powder in it, though; I added 1/2 tsp. of paprika and 1/2 tsp. of McCormick’s salt free original all-purpose seasoning. Delicious!

  4. Crystal says

    Made this as a side last night and it was yummy! I had about 1 cup of frozen corn left over from the night before, so used 5 cups zucchini and 1 cup of corn. It was tasty! :-)


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