Parmesan Onion Appetizer Squares is a recipe I’ve been making for what feels like forever. Whenever I serve them, they’re always a hit with their light oniony flavor, crispy yet creamy texture, and a tiny and unexpected touch of sweetness that everyone loves!
It seems whenever I’m planning an occasion when appetizers are served, these Parmesan Onion Appetizer Squares always make an appearance. And rightly so.
The following recipe video for Bratwurst Bites is another delicious appetizer I know you’ll also enjoy!
**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.
Jump to Recipe
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.
- Parmesan Cheese (preferably Parmigiano Reggiano)
- Grated Onion
- Mayonnaise
- Sugar
- Dried Basil
- Dried Oregano
- Salt and Pepper
- Cocktail Party Bread
Even Santa is happy when these Parmesan Onion Appetizer Squares make their appearance at a party or gathering! 🙂
The kitchen tools you’ll need are;
- Box Grater or Food Processor
- Mixing Bowls
- Measuring Cup
- Measuring Spoons
- Wooden Spoons or Spatulas
- Offset Spatula or Butter Knife
- Serving Platter
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 can I find the cocktail bread?
- 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 Amazon affiliate link for the cocktail bread (above and before the recipe card) if you’re unable to find them in your area.
The easy instructions for making Parmesan Onion Appetizer Squares;
- 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.
- Parmesan Onion Appetizer Squares come out golden, creamy, crispy and can be served hot, warm, or at room temperature so they’re perfect for any sort of party!
For additional easy appetizer ideas, please click on the following recipe titles for;
- Cream Cheese and Salami Spread with Dill Pickles
- Creamy Egg Salad Canapes
- Spinach and Artichoke Squares
- Honey and Sesame Seed Crackers
- Corn and Black Bean Dip
- Patty Melt Dip
- Cranberry Orange Meatballs from Sugar and Soul
- Ham And Cheese Croissant Bites from Coffee with Us 3
- Cheesy Polenta Fries from Jenni Field’s Pastry Chef Online
- Cuban Sausage Pinwheels from Sweet and Savory Meals
Below is the printable recipe card for today’s Parmesan Onion Appetizer Squares.
If you’ve enjoyed this recipe and look forward to making it (or have already made it), I’d appreciate if you’d take a moment to give it some feedback by way of stars near the comment section at the end of this post. Thank you so much!
- 1½ cups mayonnaise
- 1½ 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
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Preheat the oven to 400-degrees.
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Mix the first 8 ingredients together in a medium-sized bowl.
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Spread approximately 1 tablespoon of the Parmesan mixture evenly onto the cocktail bread and place on a baking sheet.
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Bake in a preheated oven for 20 minutes, or until the Parmesan Onion Appetizer Squares are golden in color.
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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
I hope you’ve enjoyed this recipe for Parmesan Onion Appetizer Squares as much as I’ve enjoyed bringing it to you!
**Note – The post above includes affiliate links. As always, I truly thank you for your support!
As an Amazon Associate, I earn from qualifying purchases. When I find a great product or service I like to share it with my readers. For additional information please view my privacy policy.
A classic…love this! Have you ever tried it with some dill in there?
Can these be re-heated?
Yes! I’d reheat them in an oven to keep them crispy. The microwave can sometimes make them soggy. Reheat them in a single layer for 5-7 minutes at 325-degrees or until hot. An air fryer will also work, but only keep them in for 1-2 minutes. Hope this helps.
Enjoy!
Renee
Made these as appetizers for Thanksgiving feast today! More than 40 of them vanished in no time! Will definitely be a tradition from here on out! Thank you!!!
Awesome, Judy!!!
These are my very, very favorites.
Now you know just how easy they are to make, and just how much everyone loves them.
Thanks for letting me know! 🙂
Have a great day, and please come back and visit me again.
Renee
YUM! These look and sound fabulous! I love those little cocktail breads!
That tray has my name on it…I'm sure you can see it if you look hard enough. And no, I'm not sharing.
These look so good. I love little cocktail sandwiches.
I LOVE these! I used to make a similar appetizer years ago; thanks for reminding me about them.
They look so golden and delicious!!
What a yummy flavor combo! Thanks for sharing this recipe 🙂
Such a great appetizer. Yum! ~ Bea @ galactopdx
Quick and easy classic flavors! A winner!
What a quick and easy recipe that everyone would love!
It is so hard but so important to get back to a sense of normalcy after such a horrific tragedy. And I have to say you have shared a serious winner in my book with this appetizer. I love the flavours.
YUMMY! This looks delicious.
Mmmm! I love oniony appetizers, and I think this looks fantastic!
This is such a great looking appetizer. Oniony, cheesy and served on sourdough cocktail bread…what more could you ask for?
Lovely heartfelt post Renee.
Renee, I totally agree – I found it odd to post something happy and lighthearted in the wake of such tragedy, but we can't dwell on sadness. We have to move on and be grateful for the family and friends that we have in our lives. As for this appie – oh baby, that looks good! You can't go wrong with onion, mayos and cheese baked on top of carbs 😉 Happy holidays!
These look so tasty! The perfect game day fare!
They really are! Actually, they’re perfect for so many occasions. Enjoy!
I can almost smell how good this is just looking at your photos! I can’t wait to try this recipe! Thanks!
My pleasure. I know you’re going enjoy these!
Silly question but I don’t know what constitutes “cocktail bread”?
Not silly at all because, sadly, cocktail bread is not widely recognized. It’s a small loaf of bread (I find mine in the deli section of the grocery store) and the slices are like 2″ x 2″. Ask in the deli section and they’ll be able to help you. I also left the Amazon link for a visual (or to purchase) if needed.
However, you can substitute thin baguette slices or probably even crackers if needed.
These are my favorite types of appetizers – I love those cocktail breads! Such a crowd pleaser!
You are a girl after my own heart, Aggie! Glad you like them too!
Renee
I love these type of appetizers! So easy and flavorful! Definitely a plus that I can make them ahead of time!
Glad you like the recipe, Ashley! Enjoy!!
Hi, I was wondering if I could use Vidalia Onions? They are my favorite to use for recipes.
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