Cheesy Mushroom Bake

READY IN: 3hrs 20mins


  • 3
    tablespoons butter
  • 12
    cup chopped celery
  • 14
    cup chopped onion
  • 12
    lb sliced mushrooms (may add more if desired)
  • 4
    cups day old whole wheat bread, cubed
  • 8
    ounces shredded cheddar cheese (mild)
  • 2
    cups milk
  • 2
    teaspoons dry mustard
  • salt and pepper, to your taste


  • In large skillet, melt butter.
  • Stir in celery, onion and mushrooms.
  • Saute over low heat, stirring occasionally, until onions become translucent and mushrooms give up their liquid, about 10 minutes.
  • In bottom of 2 quart buttered casserole, spread half of bread cubes.
  • Top with half of mushroom mixture.
  • Sprinkle with half of cheese.
  • Repeat with remaining bread, mushrooms and cheese.
  • In bowl, beat together eggs, milk, mustard, salt and pepper, Pour over layers in casserole.
  • Refrigerate at least 3 hours or overnight before baking.
  • Bake at 325 degrees, about 50 minutes, until custard is firm.
  • Let stand 5 minutes before serving.