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An overhead photo of Parmesan Onion Appetizer Squares on a blue plate.
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3.96 from 71 votes

Parmesan Onion Appetizer Squares

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!
Prep Time5 mins
Cook Time20 mins
Total Time25 mins
Course: cheesy appetizer
Cuisine: Party food
Servings: 30
Calories: 96kcal


  • 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: 1grams | Calories: 96kcal | Protein: 1g | Fat: 9g | Saturated Fat: 2g | Cholesterol: 8mg | Sodium: 190mg