Is onion cheese a thing?

Yes, onion cheese is a real and flavorful combination that appears in many culinary traditions. In the case of the onion cheese sheet pan , the roasted onions blend beautifully with sharp, salty cheeses like parmesan, forming a crisp, savory base. Whether baked into a sheet pan or used in a grilled sandwich, the pairing of cheese and onion is timeless — bold, rich, and satisfying.

What are the two-ingredient onion crisps?

Two-ingredient onion crisps are a viral minimalist snack made by baking just cheese and onions . Typically, shredded cheese (like cheddar or parmesan) is sprinkled into small rounds on parchment paper, topped with thinly sliced onions, and baked until crispy. They’re a bite-sized cousin to the onion cheese sheet pan , offering crunch and flavor with almost no effort.

How to make cheese and onion filler?

A classic cheese and onion filler often refers to the creamy mixture used in sandwiches, pasties, or baked pies. To make one at home: Mix shredded sharp cheddar, sautéed or caramelized onions, and a dollop of mayo or cream cheese. Season with salt, pepper, and optional mustard or herbs. It’s a softer, spreadable alternative to the baked crispiness of an onion cheese sheet pan , but it delivers the same satisfying combo of creamy and savory.

What is a cheese and onion sandwich called?

In the UK and Ireland, a cheese and onion sandwich is simply called a cheese and onion butty . It’s a comfort food staple made with slices of mature cheddar and either raw or caramelized onions, often layered on buttered white or brown bread. While different in texture, the essence of the onion cheese sheet pan — the bold cheese and aromatic onion duo — lives strong in this classic handheld snack.

Onion Cheese Sheet Pan – The Best 30-Minute Snack Recipe!

Name: Onion Cheese Sheet Pan
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Ingredients: 8 ounces shredded Parmesan cheese(freshly grated for best melt and crisp); 2 yellow onions, sliced into approx. 1/8-inch rounds(use a mandoline for even thickness); 1 teaspoon Italian seasoning(or a mix of oregano, thyme, and basil); 1 tablespoon chopped garlic(fresh preferred, but jarred works too); 2 ounces sliced Calabrese salami(or substitute with turkey pepperoni or skip for vegetarian)

Description

Yes — this is the viralOnion Cheese Sheet Pan everyone’s been talking about. The recipe below is sized just right for everyday snacking or sharing. But if you’re feeding a crowd (or just extra hungry), go big — simply multiply the ingredients by four to make a full sheet pan batch.

Ingredients

8 ounces shredded Parmesan cheese
(freshly grated for best melt and crisp)
2 yellow onions, sliced into approx. 1/8-inch rounds
(use a mandoline for even thickness)
1 teaspoon Italian seasoning
(or a mix of oregano, thyme, and basil)
1 tablespoon chopped garlic
(fresh preferred, but jarred works too)
2 ounces sliced Calabrese salami
(or substitute with turkey pepperoni or skip for vegetarian)

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Instructions

Step 1: Preheat the Oven

Preheat your oven to 400°F (200°C).
Line a small baking sheet (about 12 x 18 inches) with parchment paper to prevent sticking and help the cheese crisp.

Step 2: Create the Cheese Base

Evenly scatter 8 ounces of shredded Parmesan cheese on the parchment, forming a loose rectangle.
Keep the cheese layer thin and spread evenly to ensure a uniform, crispy base.

Step 3: Layer the Toppings

Top the cheese with sliced yellow onion rounds (about 1/8 inch thick), spreading them out so they roast rather than steam.
Sprinkle 1 teaspoon of Italian seasoning and 1 tablespoon of chopped garlic evenly over the onions.
Finish by layering 2 ounces of Calabrese salami across the top — spaced out for even crisping.

Step 4: Bake to Golden Perfection

Place the tray in the preheated oven.
Bake for 18–20 minutes, or until the cheese is deep golden brown and bubbling, with crisp edges.

Step 5: Cool and Slice

Remove from the oven and let the sheet pan rest for 5 minutes.
This allows the cheese to firm up and makes slicing easier.
Use a pizza cutter or sharp knife to cut into squares, strips, or wedges.

Notes

For extra crunch, leave it in an additional 1–2 minutes — just watch closely to prevent burning.
Want a larger batch? Multiply the ingredients by 4 for a full-size baking sheet.

Prep Time: 10
Cook Time: 20