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Parmesan Onion Squares Appetizers

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Parmesan Onion Squares are an easy to make appetizer with a light oniony flavor, a crisp yet creamy texture, and a tiny and unexpected touch of sweetness that everyone loves!

Vertical title text image of Parmesan onion appetizer squares with a bite taken out of the appetizer.

It seems whenever I’m planning an occasion when appetizers are to be served, these Parmesan Onion Squares always make an appearance. And rightly so.

This easy cheesy appetizer recipe is one I’ve been making for what feels like forever because whenever I serve them, they’re always a hit!

This easy appetizer post was originally published in 2013. The post itself has been updated several times, but the recipe itself has never changed.

**Please Note – The printable recipe card with detailed instructions, complete ingredient measurements, and nutritional information for making Parmesan Onion Appetizer Squares is available near the end of this post. OR you can click on the “jump to recipe” button (found above) to be taken directly to the printable recipe.


A vertical collage image of Parmesan Onion Squares with a title text overlay in the center.

The ingredient list:

**Note – The following lists of ingredients plus kitchen tools and equipment (highlighted in blue) contain affiliate links for your consideration and shopping convenience.

Kitchen tools and equipment needed:

Even Santa is happy when these Parmesan Onion Squares appetizers make their appearance at a party or gathering! 🙂 The photo below is from 2013.

Parmesan Onion Appetizer Squares with Santa Claus table cloth from 2012

Can Parmesan Onion Appetizers be made in advance?

  • Yes! I even recommend it! However, it’s not the end of the world if it doesn’t happen.
  • Mix up the spread in advance and refrigerate until you’re ready to spread it on the bread and bake.
  • This can be done up to 48 hours in advance of spreading and baking.

Can I substitute anything for the cocktail bread?

  • Yes!
  • Substitute a thinly sliced baguette or even crackers will work in a pinch.

Where to find cocktail bread in the store?

  • I always find mine in the deli section of the grocery store. If you don’t see them readily, ask someone. I’ve seen them in rye and sourdough flavors. I’ve used both for this recipe.
  • I’ve also left an affiliate link for the cocktail bread (aka party square bread) if you’re unable to find them in your area.
Closeup photo of golden Parmesan Onion Appetizer Squares

Is the onion overpowering in this recipe?

Nope! Not at all!!

The reason I’ve added that little touch of sugar into the mix (which may seem surprising) is to take away a lot of that pungent onion bite, leaving only a mild and mellow onion flavor that combines so nicely with the Parmesan cheese.

Can a different sweetener be used in place of the sugar?

Yes, by all means use what you like.

Just remember to taste-as-you-go, and when you’re happy with the sweetness level, call it a day.

These cheesy appetizers aren’t meant to be sweet, just sweet enough to take away a little of the bite from the onion.

That said, the sugar (or sweetener) can be left out entirely if you enjoy a strong onion flavor. Totally your call.

Potential sugar substitutes:

  • honey
  • agave
  • coconut sugar
  • swerve
  • monk fruit powder

At what temperature should these appetizers be served?

These wonderful little appetizers can be served hot, warm, or at room temperature making them perfect for any sort of party!

The easy instructions:

  • Mix everything in a medium bowl, except the cocktail bread.
  • Spread approximately 1 tablespoon of the Parmesan mixture evenly onto the cocktail bread squares. 
  • Place them on a baking sheet and pop them into a preheated 400-degree oven for approximately 20 minutes, or until they’re all puffed and golden.

How to make Parmesan Onion Appetizer Squares -

Vertical Parmesan Onion Squares photo collage with a title text overlay graphic in the center.

How to make Parmesan Appetizer Squares:


Additional appetizer recipe you’ll enjoy:

Crave-Worthy Cream Cheese Salami Pickle Dip is a quick and easy update of the salami and pickle pinwheel appetizers of the past, but this updated version is faster, easier, and has a bigger kick of flavor.

Cream Cheese Salami Spread with Dill Pickles on an oblong tray with fresh dill

Everything you love about a patty melt sandwich is in this easy to make Patty Melt Dip. It’s sure to be a real crowd-pleaser at your next party or celebration!

A bowl full of cheesy patty melt dip on party square bread

  • Parmesan Onion Squares Appetizers (pictured below) THIS IS THE PLACE!!
A closeup vertical photo of a hand holding a Parmesan onion squares appetizers with a bite taken out and a title text overlay graphic

Below is the printable recipe card along with the nutritional information and exact measurements for making today’s easy appetizer of Parmesan Onion Squares. 

Overhead photo of a blue tray of Parmesan onion appetizer squares.

Parmesan Onion Appetizer Squares

Renee - Kudos Kitchen
Parmesan Onion Appetizer Squares are always a hit with their light oniony flavor, crispy yet creamy texture, and a tiny and unexpected touch of sweetness that everyone loves!
3.93 from 69 votes
Prep Time 5 mins
Cook Time 20 mins
Total Time 25 mins
Course cheesy appetizer
Cuisine Party food
Servings 30
Calories 96 kcal


  • cups mayonnaise
  • cup Parmesan cheese grated or shredded
  • 3 tablespoons grated onion
  • ½ teaspoon salt
  • pinch black pepper
  • 1 teaspoon dried oregano
  • 1 teaspoon dried basil
  • 1 teaspoon granulated sugar
  • 30 party cocktail bread


  • Preheat the oven to 400-degrees.
  • Mix the first 8 ingredients together in a medium-sized bowl.
  • Spread approximately 1 tablespoon of the Parmesan mixture evenly onto the cocktail bread and place on a baking sheet.
  • Bake in a preheated oven for 20 minutes, or until the Parmesan Onion Appetizer Squares are golden in color.
  • Remove and serve hot, warm, or at room temperature.


Tools and equipment:
knife or offset spatula, baking sheet, parchment paper (optional), wooden spoon, 
box grater, measuring spoons, measuring cups, medium bowl


Serving: 1gramsCalories: 96kcalProtein: 1gFat: 9gSaturated Fat: 2gCholesterol: 8mgSodium: 190mg
Keyword cheesy baked appetizers, Parmesan Onion Appetizer Squares
Tried this recipe?Let us know how it was!

Thank you so much for visiting me here today in my Kudos Kitchen! 

I sincerely hope you’ve enjoyed this super easy and tasty appetizer recipe for Parmesan Onion Squares as much as I’ve enjoyed bringing it to you!

A plate full of Parmesan onion appetizer squares with a blue striped napkin.

Should you have any questions or comments regarding this recipe or anything else you’ve seen on my site, please don’t hesitate to reach out to me. It is always my distinct pleasure to get back with a reply just as soon as I possibly can!

**Note – The post above includes affiliate links. As always, I truly thank you for your support!

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Recipe Rating

Samantha Dawn

Friday 17th of July 2020

So easy and flavourful! We can't wait for our next party to pull these out again.


Friday 17th of July 2020

Delicious!! I love these for snacking, but they are o good I can easily make a meal of them!

Ricky Shoemake

Monday 26th of August 2019

Hi, I was wondering if I could use Vidalia Onions? They are my favorite to use for recipes.


Monday 26th of August 2019

Sure! I often use Vidalia onions. But when I do, I cut back on the sugar just a pinch. However, that's your call. If you like things a little sweeter add all the sugar. Enjoy the recipe. I know you'll love these! Renee

Ashley F

Sunday 25th of August 2019

I love these type of appetizers! So easy and flavorful! Definitely a plus that I can make them ahead of time!


Sunday 25th of August 2019

Glad you like the recipe, Ashley! Enjoy!!


Sunday 25th of August 2019

These are my favorite types of appetizers - I love those cocktail breads! Such a crowd pleaser!


Sunday 25th of August 2019

You are a girl after my own heart, Aggie! Glad you like them too! Renee