Step 1

Preheat oven to 375º F. Line baking sheets with parchment paper or silicon baking mats. Set aside.

Step 2

Heat butter and brown sugar in a 2-quart saucepan over medium heat, stirring frequently with a wooden or silicon spoon, until butter has melted and mixture is smooth. Stir in oats, flour, salt, egg, and vanilla.

Step 3

Drop cookie batter by the teaspoon onto prepared baking sheets, leaving at least 2 inches between each cookie to allow them to spread.

Step 4

Bake for 5 -7 minutes, watching closely to prevent them from over-baking. The lace cookies should be golden brown.

Step 5

Allow to cool on the cookie sheet for 30 seconds and remove onto racks to cool completely.

Step 6

Store in an airtight container.