Breakfast Sandwich

Mustard Croissant Breakfast Sandwiches

Croissants spread with Dijon, filled with scrambled egg, bacon and cheddar, warmed until the cheese melts.

35 min · 4 sandwiches · Cook, assemble and warm

Split croissants filled with scrambled egg, melted cheese and bacon, with herbs scattered over

About Darleen

on Recipesdarleen

Darleen is a mom who turned her slow cooker into a lifesaver, sharing cozy, easy-to-make recipes that bring comfort to busy days.

268 recipes by Darleen Vance

Published January 8, 2026

How Recipesdarleen publishes recipes

The bacon crisps first, then six eggs are scrambled gently over medium-low heat until fully set but still soft.

Dijon goes inside each croissant before the egg, two bacon slices and a slice of cheddar, and five to seven minutes at 350°F melts the cheese.

Why This Recipe Works

  • Low heat and gentle stirring keep the scrambled eggs soft.
  • Mustard against the croissant keeps the bread from going soggy.
  • A short warming melts the cheese without drying the eggs.
  • Croissants crisp at the edges in the oven.

Inside the Croissant

Assembled in order, then warmed.

  1. Croissant

    Split, with Dijon spread inside.

  2. Scrambled egg

    A quarter of the soft scrambled eggs.

  3. Bacon

    Two crisp slices per sandwich.

  4. Cheddar

    One slice, laid on top of the filling.

Warmed at 350°F for 5 to 7 minutes until the cheese melts.

How to Make It

  1. Bacon cooked

    Heat the oven to 350°F. Cook the bacon in a skillet until crisp, then drain on paper towels.

  2. Eggs scrambled

    Whisk the eggs with milk, salt and pepper. Melt the butter in a nonstick skillet over medium-low heat and cook the eggs, stirring gently, until fully set but still soft.

  3. Assembled

    Spread Dijon mustard inside the croissants. Fill each with scrambled egg, two bacon slices and one slice cheddar.

  4. Warmed

    Place the sandwiches on a sheet pan and warm 5 to 7 minutes, until the croissants are crisp at the edges and the cheese melts.

Ingredient Notes

Croissants
Four large, split.
Eggs
Six, whisked with milk and cooked until fully set.
Dijon mustard
Two tablespoons, spread inside the croissants.

Success Tips

  • Pull the eggs while they still look glossy; they finish in the oven.
  • Drain the bacon well so the croissant stays crisp.
  • Warm on a sheet pan rather than wrapped, so the pastry stays flaky.

Serving Ideas

Serve hot, cut in half, with extra mustard on the side if you like.

Storage and Reheating

Refrigerate

Refrigerate assembled leftovers up to 2 days; reheat to 165°F.

Frequently Asked Questions

Where does the mustard go?

Spread inside the croissant before the filling.

How done should the eggs be?

Fully set but still soft, before the sandwiches are warmed.

Recipesdarleen

Mustard Croissant Breakfast Sandwiches

Croissants spread with Dijon, filled with scrambled egg, bacon and cheddar, warmed until the cheese melts.

Prep
15 min
Cook
20 min
Total
35 min
Yield
4 sandwiches

Cook, assemble and warm

EquipmentSkillet · Nonstick skillet · Sheet pan

Ingredients

Instructions

  1. Heat the oven to 350°F. Cook the bacon in a skillet until crisp, then drain on paper towels.
  2. Whisk the eggs with milk, salt and pepper. Melt the butter in a nonstick skillet over medium-low heat and cook the eggs, stirring gently, until fully set but still soft.
  3. Spread Dijon mustard inside the croissants. Fill each with scrambled egg, two bacon slices and one slice cheddar.
  4. Place the sandwiches on a sheet pan and warm 5 to 7 minutes, until the croissants are crisp at the edges and the cheese melts.