Oven Cheese & Spinach Fondue

This isn’t fondue in the melted-pot-with-skewers sense. It’s a baked savory custard where cubed white bread, shredded American cheese, and spinach soak in a seasoned egg and milk mixture, then bake low and slow until the center sets and the top puffs up golden. Think of it as a cross between a strata and a souffle.

Six eggs beaten with milk, dry mustard, and salt create the custard base. The bread cubes absorb all that liquid during baking, swelling into soft, custardy pillows while the cheese melts throughout. The frozen spinach adds pockets of green and earthy flavor without any extra prep beyond draining.

Baking at a low temperature for a full hour is what gives this its smooth, set texture instead of a rubbery scramble. Serve it straight from the oven. Like a souffle, it deflates as it cools.

Chef Tips

• Drain the frozen spinach thoroughly. Squeeze it in a clean towel until no more liquid comes out. Excess water makes the custard watery and prevents it from setting.
• Remove the bread crusts. Crusts don’t absorb custard well and stay tough and chewy.
• The dry mustard adds sharpness that intensifies the cheese flavor without tasting like mustard. Don’t skip it.
• Check the center with a gentle press. When it springs back and doesn’t jiggle, it’s set.

Variations

• Use sharp cheddar or Gruyere instead of American for a more complex cheese flavor.
• Add diced ham or cooked bacon for a heartier brunch main.
• Assemble the night before and refrigerate. Bake straight from the fridge, adding 10 to 15 minutes to the cook time.