Pre-heat oven to 325F

Saute the onions and mushrooms in butter in a pan on medium heat.

Remove the pan from the heat and wait 5 minutes until cooled.  

Add the onion and mushroom mixture to a baking dish and add the softened cream cheese, egg, salt and pepper and mix well. 

Bake for 25 minutes until creamy and bubbly. 

Serve hot with crackers or sliced veggies!