Chicken Cordon Bleu Sauce (Dijon Cream)
A creamy, tangy Dijon cream sauce built on a classic béchamel base — butter, flour, whole milk, and chicken broth — enriched with Gruyère or Parmesan and finished with Dijon mustard off the heat. Ready in about 20 minutes. Serve spooned over baked or fried chicken cordon bleu, or alongside grilled chicken breast.
Equipment
- Medium saucepan
- Whisk essential for lump-free roux and smooth béchamel
- Fine-mesh strainer optional; use if lumps form
Ingredients
Dijon Cream Sauce
- 2 tablespoons unsalted butter unsalted allows precise seasoning control
- 2 tablespoons all-purpose flour forms the roux base
- 1 cup whole milk cold or room temperature; do not use hot milk
- 1/2 cup low-sodium chicken broth adds savory depth
- 1 teaspoon Dijon mustard increase to 2 tsp for more tang; added off heat
- 1/4 cup grated Gruyère or Parmesan added off heat in small additions to prevent graininess
- salt and white pepper to taste; season lightly — ham and cheese inside the chicken are already salty
- 1 pinch ground nutmeg traditional in béchamel; adds subtle warmth
Optional
- 2 tablespoons heavy cream stir in at the end for a richer, silkier finish
Instructions
- Melt butter in a medium saucepan over medium-low heat until just foaming. Add the flour all at once and whisk constantly until a smooth, pale paste forms. Cook the roux for 1-2 minutes, whisking the entire time — this cooks out the raw flour taste. Do not let it turn golden or brown.
- Remove the pan from heat briefly. Pour in about one-third of the milk while whisking vigorously to prevent lumps. Return to medium-low heat. Add the remaining milk in a slow, steady stream, whisking constantly. Add the chicken broth the same way. Bring to a gentle simmer, then reduce to low and cook 5-8 minutes, stirring frequently, until the sauce thickens enough to coat the back of a spoon.
- Remove saucepan from heat completely. Whisk in the Dijon mustard. Add the grated cheese in small additions, stirring after each until fully melted and smooth. Adding cheese and mustard off the heat prevents proteins from tightening and causing a grainy or broken sauce — the residual heat is sufficient.
- Season with salt, white pepper, and a pinch of nutmeg. Taste — season lightly, as the ham and cheese in cordon bleu are already salty. For a richer finish, stir in 2 tablespoons of heavy cream. Serve immediately over chicken, or keep warm over the lowest heat setting, whisking occasionally.
Notes
Use cold milk, not hot. Adding cold or room-temperature milk to a warm roux while whisking constantly prevents lumps. Hot milk added all at once can cause lumps to form before you can whisk them out.
Mustard and cheese go in off the heat. This is non-negotiable. On high heat, cheese proteins seize and create a grainy texture. Off-heat addition keeps the sauce silky every time.
Sauce too salty? Whisk in a splash of unseasoned cream or milk. Season lightly at first — the ham and cheese stuffing inside the chicken add plenty of salt.
Skin forming on stored sauce? Press plastic wrap directly onto the sauce surface before refrigerating. Whisk the skin back in when reheating.