Preheat the oven to 375°F or 190°C and line baking sheets with parchment paper.

Mix sugar, cinnamon, and nutmeg in a small bowl, stirring vanilla into the melted butter if using.

Brush both sides of each tortilla generously with melted butter, covering the edges well.

Sprinkle cinnamon sugar evenly over both sides, pressing lightly so it adheres.

Cut tortillas into triangles, strips, or festive shapes as desired.

Arrange the pieces in a single layer on the baking sheets without overlapping.

Bake for 10 to 12 minutes, rotating the pan halfway, until golden with lightly curled edges.

Let the crisps cool completely on the baking sheet to achieve full crunch.