1 (8 oz) package cream cheese.
2 cups of grated cheddar cheese or Jalapeno jack.
1 cup of mayonnaise.
1 diced small purple onion.
In a shallow baking dish, place all of the ingredients and microwave on high for 2 minutes.
Stir the mixture well to combine and bake in a preheated oven to 350° for 20 minutes.
Easy, peasy and cheesy! I serve this with wheat thins or fritos scoops for dipping. Feel free to serve it with whatever you like, it will still taste good!
Source : allrecipes.com