Add all ingredients to a blender and blend until smooth.
To heat the sauce, transfer to a saucepan over medium-low heat. Stir to heat the sauce for about 2-4 minutes or until desired temperature. Alternatively, the sauce can be added to a microwave safe dish and heated on high for 2-3 minutes in the microwave.
*Or cooked potato. **Canned carrots can be used instead after draining and rinsing. **Do not seed the jalapeño if you want a spicy nacho cheese sauce.