Ingredients
Method
- Preheat oven to 350°F and line baking sheets with parchment. Melt butter and brown sugar in a saucepan over medium heat, stirring until bubbly, about 2 minutes. Cool 2 minutes.
- Stir in the egg and vanilla until smooth. Add flour, salt, and oats; mix just until combined.
- Drop rounded teaspoonfuls of batter 3 inches apart on the sheets. Bake one sheet at a time, 8 to 10 minutes, until deeply golden and lacy.
- Cool cookies on the sheet for 2 minutes, then slide a spatula under each and transfer to a wire rack to cool completely.
Notes
Bake one sheet at a time for the most even browning. If the cookies stiffen before you can peel them off the parchment, pop the sheet back into the warm oven for 30 seconds to soften them. Once cool, the cookies will be fragile but beautifully crisp.
