Butter a pie dish including the sides and rim. Make sure the pie dish is as wide as your tortillas.
Layer with another tortilla shell. Repeat layering ending with the last tortilla shell. Butter this top shell with butter.
Bake @ 350 degrees, for 25-30 minutes.
Uncover, reset oven to 400 degrees, and bake an additional 15-20 minutes, until crispy and golden brown.