Video: How to Make Frito Pie Content Tips Warnings 1 Preheat oven to 180 ° C. 2 Place 2 cups of Fritos chips in a baking dish. 3 Sprinkle the Fritos chips with half the onion and half the cheese. 4 Pour the chili over the onion and cheese. 5 Sprinkle with chili, leftover Fritos, onions and cheese. 6 Bake for 15-20 minutes, or until cheese is bubbling. Serve hot. Tips Many variations can be prepared by altering any combination of ingredients. Warnings Frito's cake will be hot.