Combine American cheese and half and half in a medium microwave safe bowl. Microwave on high power in 1 1/2 minute intervals, stirring in between each interval, until melted and creamy, 5 to 7 minutes.
Stir in jalapeños, jalapeño juice, cumin, and cayenne. Microwave for 30 seconds. Stir and serve immediately.
Restaurant-Style White Queso Dip · Dinner Match Lab | Dinner Match Lab