Preheat oven to 425 degrees F. Place a popover pan into the oven.*
In a large bowl, whisk together milk and eggs until frothy, about 1 minute. Whisk in flour, chives, garlic powder, salt, basil and pepper until just incorporated.
Remove popover pan from the oven and generously grease with bacon fat. Working quickly, fill popover pan half full with egg mixture.
Place into oven and bake for 25-30 minutes, or until golden brown.