Ingredients
Method
- Preheat oven to 375°F and line a baking sheet with parchment paper.
- Spread mustard-mayo mixture evenly on each slice of bread.
- Layer cooked chicken slices over half of the bread slices.
- Sprinkle grated cheese over the chicken.
- Top with remaining bread slices to form sandwiches.
- Brush melted butter lightly on the top of each croque.
- Place sandwiches on prepared baking sheet.
- Bake 12–15 minutes until bread is golden and cheese starts bubbling.
- Optionally, switch to broil for 1–2 minutes for a deeper golden crust.
- Remove from oven and let rest 2–3 minutes.
- Slice diagonally for serving.
- Garnish with fresh herbs if desired and enjoy warm.
Notes
Common mistakes include overloading with chicken or cheese, which can cause the croque to be messy or unevenly heated. Use thin slices of chicken and spread sauce evenly. For a richer flavor, try grating the cheese fresh.
Substitutions: Swap Gruyère for Swiss or cheddar. Use whole grain or multigrain bread for a heartier option. Mayonnaise can be replaced with Greek yogurt for a lighter version.
Step-by-step insights: Assemble sandwiches with care to keep edges aligned for even browning. Letting the croque rest briefly after baking helps cheese set and filling settle.