Warm Ham and Swiss Cheese Croissants with Poppy Seeds
Golden-baked mini croissants filled with smoked ham and Swiss cheese, brushed with an herby Dijon butter spread and topped with poppy seeds. A simple, elegant appetizer or light lunch that comes together in under 30 minutes. The tangy mustard and honey butter balances the salty ham, while toasted croissants provide satisfying texture. Serve warm for best flavor, ideal for brunches, casual gatherings, or quick entertaining.
Ingredients
- ⅓ cup unsalted butter, at room temperature
- 2 tablespoon Dijon mustard
- 2 green onions, thinly sliced
- 1 tablespoon honey
- ½ teaspoon sea salt
- ¼ teaspoon black pepper
- 12 mini croissants, halved horizontally
- 1 pound smoked deli ham, thinly slicedprosciutto or turkey ham1:1protein-swap
medium
- 12 Swiss cheese slices, diagonally sliced
- 1 large egg white
- 2 teaspoon poppy seedssesame seeds or everything bagel seasoning1:1topping-swap
low
Instructions
- 1
Preheat oven to 375F and lightly oil a 9x13 baking dish.
- 2
Combine butter, Dijon mustard, green onions, and honey in a small bowl; season with salt and pepper.
- 3
Halve croissants horizontally and spread butter mixture on both cut sides of each.
- 4
Fill each croissant half with ham and cheese, then press halves together to form sandwiches.
- 5
Arrange croissants in a single layer in the prepared baking dish.
- 6
Whisk egg white with water in a small bowl; brush mixture over croissant tops.
- 7
Sprinkle poppy seeds evenly over egg-washed croissants.
- 8
Bake until golden brown and toasted, 15-18 minutes.
- 9
Let stand 5 minutes before serving warm.
Tips
Bring butter to room temperature before mixing so the mustard blend spreads evenly without tearing delicate croissants.
Don't skip the 5-minute rest; it allows cheese to set slightly and makes croissants easier to handle when plating.
Good to Know
Cooled croissants keep in an airtight container at room temperature up to 1 day. Refrigerate up to 3 days in an airtight container; reheat at 350F for 5 minutes before serving.
Prepare butter mixture and assemble croissants up to 4 hours ahead; cover and refrigerate. Apply egg wash and poppy seeds just before baking.
Serve warm immediately after baking for optimal texture and melted cheese. Pair with fresh fruit, a light salad, or soup.
Common Mistakes
Do not skip room-temperature butter to avoid tearing croissants when spreading.
Do not over-bake to prevent croissants from drying out; check at 15 minutes.
Do not skip the egg wash to achieve proper browning and visual appeal.
Substitutions
Dairy-Free Swaps
General Alternatives
medium
low
FAQ
Can I make these ahead and freeze?
Yes. Assemble unbaked croissants, wrap tightly in plastic wrap and foil, and freeze up to 1 month. Bake from frozen, adding 5-8 minutes to cooking time. Do not thaw first.
What if I don't have poppy seeds?
Sesame seeds, everything bagel seasoning, or grated Parmesan work well. Use the same amount. For a plain finish, brush with egg wash only.
How long can baked croissants stay warm?
Up to 30 minutes in a 200F oven or wrapped in foil at room temperature. Beyond that, cheese hardens; reheat at 350F for 5 minutes before serving.