Step 1: Melt butter in a medium saucepan over medium heat.

Step 2: Whisk in the flour and cook for 1-2 minutes to form a roux (this helps thicken the dip).

Step 3: Slowly add the warm milk and cream, whisking constantly to avoid lumps.

Step 4: Reduce heat to low and gradually stir in the shredded cheeses. Continue stirring until fully melted and smooth.

Step 5: Stir in the green chilies, jalapeños (if using), garlic powder, onion powder, and salt. Simmer for a few minutes to blend the flavors.

Step 6: Transfer to a serving bowl, garnish with chopped cilantro, and serve warm with tortilla chips.