Pupusas, Chicken & Cheese Stuffed corn tortillas with seasoned chicken, mozzarella cheese & beans. Delicious stuffed corn tortillas. Chicken raised without antibiotics. Gluten free. Inspected for wholesomeness by US Department of Agriculture. Please recycle. What's a pupusa? Originating from El Salvador, a pupusa is a stuffed corn tortilla filled with delicious goodness, such as chicken & cheese. Our tortillas are produced with organic corn masa and are gluten free. Pupusas are traditionally served with a side of curtido (cabbage slaw with vinegar) and salsa roja. Find the recipe for curtido on the side panel. www.trespupusas.com. Authentic. Stuffed corn tortillas.