Delicious Salvadoran stuffed corn tortillas. Natural Latin cuisine. Made with non-GMO corn masa. Vegetarian. Gluten free. Delicious. Authentic. Please recycle. What's a Pupusa? Originating from El Salvador, a pupusa is a stuffed corn tortilla filled with delicious goodness, such as spinach & cheese. Our tortillas are produced with organic, non-GMO corn masa and are naturally gluten free. Pupusas are traditionally served with a side of curtido (cabbage slaw with vinegar) and solsa roja. Find the recipe for curtido on the side panel. www.trespupusas.com.