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Cheesy Onion Crisps

alexa dan
Prep Time 10 minutes
Cook Time 18 minutes
Cooling Time 10 minutes
Total Time 38 minutes
Servings 5

Ingredients
  

  • 1 medium yellow or red onion very thinly sliced
  • 1 cup shredded sharp cheddar cheese or a mix of cheddar and Gruyère
  • 2 tablespoons all-purpose flour
  • 1 teaspoon dried thyme or oregano optional
  • Pinch of salt and black pepper

Instructions
 

  • Preheat oven to 400°F (200°C) and line two large baking sheets with parchment paper.
  • In a medium bowl, toss sliced onions, shredded cheese, flour, thyme (if using), salt, and pepper until evenly coated.
  • Arrange small, even piles (about 2–3 inches wide) of the mixture on the baking sheets, leaving space between each pile for spreading.
  • Bake for 15–18 minutes, or until cheese is deep golden brown and edges are crispy. Watch closely to prevent burning.
  • Cool on the baking sheet for 5–10 minutes to allow crisps to harden, then transfer to a wire rack to finish cooling.

Notes

Crispness matters: Remove crisps only when they are uniformly golden brown and firm. Pale spots may mean they need a few more minutes.
Thin slicing is essential: Paper-thin onion slices cook evenly and crisp at the same rate as the cheese. A mandoline slicer works best for consistent cuts.
Cheese quality: Use sharp, high-quality cheese and avoid pre-shredded varieties with anti-caking agents to ensure the best texture.
Storage: Best eaten fresh, but can be stored in an airtight container at room temperature for up to 2 days. Re-crisp in a 350°F (175°C) oven for a few minutes if needed.
Flavor twist: Add chili flakes, smoked paprika, or a pinch of garlic powder for an extra kick.