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Breakfast · Part 2 of 3: Instructions

Easy Ham and Swiss Croissant Sandwiches Step-by-step instructions

Three golden-brown ham and Swiss croissant sandwiches served on a rustic wooden board.
Prep
Cook
Total
Serves
3

Before you start

Before beginning the assembly, ensure the oven is fully preheated to 350°F (175°C) to guarantee an even bake. Have the deli ham and Swiss cheese slices ready on a clean workspace.

Use a sharp serrated knife to slice all croissants beforehand, ensuring they are ready for immediate assembly. Keep the croissants at room temperature to ensure they crisp up properly rather than steaming in the oven from cold temperatures.

Ingredients at a glance (4)
  • 3 croissants, store-bought or made ahead
  • 2 tbsp honey mustard
  • 6 slices deli ham
  • 3 slices Swiss cheese

Instructions

Preparation

  1. Prepare the croissants
    Preheat the oven to 350°F (175°C). Using a serrated knife, carefully slice each croissant in half horizontally. Arrange the bottom halves on a baking sheet to prepare them for filling.
    Look for The croissants are cut cleanly in half.
    Tip Use a gentle sawing motion with the knife to avoid crushing the flaky layers.

The croissants are sliced horizontally into two even halves. The baking sheet is ready, and all ingredients are measured and prepared for assembly.

Ensure the workspace is clean and organized to facilitate a quick transition into the assembly phase, keeping the croissants intact and ready for their fillings.

Assembly

  1. Assemble the sandwiches
    Brush the inside of each croissant half with honey mustard. Layer two slices of deli ham onto each bottom half, then top each with a slice of Swiss cheese. Place the top croissant halves over the cheese.
    Look for The ham is folded neatly to fit inside the croissant.
    Tip Fold the ham slices rather than laying them flat to create more volume and texture.

Each croissant half is brushed with a light layer of honey mustard. The ham is folded to provide height, and the Swiss cheese is placed centrally. The top halves are aligned perfectly with the bottoms, ensuring the sandwiches are stable and ready to enter the oven for the final heating stage.

Baking

  1. Bake until melted
    Place the baking sheet in the preheated oven and bake for 8 to 10 minutes. The croissants should be golden brown, and the Swiss cheese should be bubbling and fully melted. Remove carefully from the oven and serve warm.
    Look for The cheese is bubbling and the croissant exterior is crisp.
    Tip Watch the croissants closely during the final minutes to ensure the flaky edges do not burn.

The croissants are baked until the exterior is golden and crisp. The Swiss cheese must be fully melted and bubbling slightly, indicating the internal heat has reached the ham. The final product should be removed immediately from the oven to prevent the delicate pastry from becoming too dark or brittle.

Common mistakes

Avoid over-stuffing the croissants, as this can cause them to collapse or spill cheese onto the baking sheet during the heating process. Do not skip the preheating phase of the oven, as a lower temperature will result in soggy rather than crispy pastry.

Additionally, ensure the mustard is applied evenly across the entire surface of the bread to avoid dry spots, and do not use excessive amounts of sauce, which can make the croissant base overly soft.

How to tell it’s done

The sandwiches are done when the croissants achieve a deep golden brown color and the Swiss cheese has completely melted, bubbling slightly around the edges of the ham.

The texture should feel firm to the touch, and the interior should be warm and fragrant. No specific internal temperature is required as the ingredients are either ready-to-eat or safe at the heat levels reached during the baking process.

Coming up in Part 3: common questions

  • Can these be prepared in an air fryer?
  • What is the best way to prevent the croissants from getting soggy?
  • Is it possible to use a different type of cheese?

Also in Part 3: variations (Turkey and Provolone, Savory Herb Twist), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

2 variations · storage & make-ahead · 3 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)