Snacks & Appetizers
Cheesy Onion Crisps
Thin sweet onion rounds baked over cheddar until the cheese forms crisp edges, finished with rosemary and served with dipping sauce.
By PedroPublished August 24, 2026 · Updated September 14, 2026i
Estimated total time. This covers the full recipe from start to finish, including preparation and any resting, chilling, baking, or cooling. Some of that time is hands-off.
If the browned cheese around the edge of a dish is the bit you’d choose first, there’s plenty of it here. These onion crisps have a thin round of sweet onion in the middle and cheddar that spreads into golden, crisp edges around it. A little rosemary keeps them savory without needing much else.
That salty edge against the sweeter onion is what I like about these. I’d serve them with a small bowl of marinara or ranch, especially if the rest of the food on the table is soft or creamy. They do need a few minutes on the tray to firm up, but after that you can pick one up and dip it without reaching for a fork.
Ingredients for Cheesy Onion Crisps
I use sweet onions with shredded cheddar and one sprig of fresh rosemary. A little neutral oil or cooking spray is only for the parchment, while marinara or ranch is optional and stays on the side for serving.
- 3 large sweet onions
- 150 g cheddar cheeseshredded
- 1 sprig fresh rosemary
- neutral oil or cooking sprayfor lightly greasing the parchment
- marinara sauce or ranch dressingfor serving
From my kitchen
Watch me make Cheesy Onion Crisps
See the recipe come together, then follow the written steps below.
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How to Make Cheesy Onion Crisps
Prepare two parchment-lined baking sheets and lightly grease the paper before arranging the cheese portions. Keep the onion rounds thin and even so the batch finishes at a similar pace.
Prepare the trays
Heat the oven to 180°C. Line two baking sheets with parchment paper and lightly grease the paper.
Slice the onions
Peel the sweet onions and slice them very thinly, trying to keep the rounds as even as possible.
Portion the cheese
Divide the shredded cheddar into about 16 small piles on the prepared baking sheets, leaving some space between them.
Add onion and rosemary
Place one onion slice on each pile of cheese. Finely chop the rosemary and sprinkle it over the onion rounds.
Bake until crisp
Bake for about 11 to 13 minutes, until the cheese is fully melted and the edges are golden and crisp. Watch closely during the final minutes because the timing can vary with the thickness of the onion slices.
Let them firm
Leave the crisps on the baking sheets for 5 to 7 minutes. They will firm as they cool and become easier to remove.
Serve the crisps
Serve warm or at room temperature with marinara sauce, ranch dressing, or your preferred dipping sauce.
Tips that make a difference
- Keep the onion rounds very thin and even so the crisps bake at a similar pace.
- Leave space between the cheddar piles because the cheese spreads as it melts.
- Watch the edges during the final minutes and remove the trays once they look golden and crisp.
- Let the crisps rest on the baking sheets before lifting them because they firm as they cool.
These start as small piles of cheddar and come out as crisp-edged rounds with sweet onion in the middle. I give them the full rest on the tray before moving them, then serve them with something to dip on the side.
The Crisp Edges I Look For
I leave the crisps on the tray for the full resting time before trying to lift them. The cheddar should be deeply golden around the onion, with a firm edge that holds when picked up. If the center is still soft from the oven, those few minutes on the tray make the difference.
Save this recipe
Cheesy Onion Crisps
Thin sweet onion rounds baked over cheddar until the cheese forms crisp edges, finished with rosemary and served with dipping sauce.
Ingredients
Instructions
- 1Prepare the trays
Heat the oven to 180°C. Line two baking sheets with parchment paper and lightly grease the paper.
- 2Slice the onions
Peel the sweet onions and slice them very thinly, trying to keep the rounds as even as possible.
- 3Portion the cheese
Divide the shredded cheddar into about 16 small piles on the prepared baking sheets, leaving some space between them.
- 4Add onion and rosemary
Place one onion slice on each pile of cheese. Finely chop the rosemary and sprinkle it over the onion rounds.
- 5Bake until crisp
Bake for about 11 to 13 minutes, until the cheese is fully melted and the edges are golden and crisp. Watch closely during the final minutes because the timing can vary with the thickness of the onion slices.
- 6Let them firm
Leave the crisps on the baking sheets for 5 to 7 minutes. They will firm as they cool and become easier to remove.
- 7Serve the crisps
Serve warm or at room temperature with marinara sauce, ranch dressing, or your preferred dipping sauce.
Questions you might have
How thin should I slice the onions?
Slice them as thinly as you can and keep the rounds as even as possible. A mandoline helps if you have one; consistency matters more than an exact measurement.
Why do the crisps need to rest on the trays?
The 5 to 7 minute rest lets them firm as they cool and makes them easier to remove.
