1
Adjust rack to middle position (middle and top positions for 12 servings) and preheat oven to 425 degrees. Generously coat a standard 12-cup muffin tin (two muffin tins for 12) with nonstick cooking spray.
Cut four evenly spaced 1-inch slits around the edge of each tortilla.
Wrap tortillas in damp paper towels and microwave until warmed through and pliable, 30-60 seconds.
Press tortillas into wells of prepared muffin tin to form tortilla cups. TIP: Keep the pleats of the tortillas above the edge of the wells to prevent any egg mixture from leaking out.