1. Preheat a non-stick skillet or flat-top griddle over medium-to-high heat to 375°F.
2. Add cooking oil or spray to the skillet or grill so the Pupusas do not stick.
3. Place frozen (or slacked) pupusas to well-oiled skillet or griddle.
4. Cook for about 4 minutes, until both sides are golden and crisp (internal temp of 165°F). 5. Hold for up to 30 minutes in a warming station at 140°F or higher.

Alternate Method: Pupusas may be oven-baked. Preheat oven to 400°F. Add cooking oil or spray to a baking sheet and place Pupusas on the sheet. Bake for 5-10 min (internal temp of 165°F).