Grease a 2-quart baking dish with nonstick cooking spray.
In a medium bowl, beat the cream cheese with an electric mixer until smooth.
Combine ingredients: Add the fontina, white cheddar, pepper jack, and diced green chiles to the cream cheese. Mix on low speed until well combined.
Pour the cheese mixture into the prepared baking dish. Bake in the preheated oven for 20 minutes, or until golden brown and bubbly. For extra browning, broil for 3-5 minutes, watching closely to prevent burning.
Serve immediately with your favorite chips, crackers, or crostini.
Notes
Optional: Garnish with sliced jalapenos for an extra kick of heat.