Heat oven to 350°F. Line 2 baking sheets with parchment or silicone mats.
Whisk melted butter, brown sugar, and granulated sugar in a medium bowl until glossy.
Whisk in the egg, vanilla, corn syrup, and salt until smooth.
Stir in oats, flour, and baking soda just until combined. The batter will be loose.
Rest the batter 10 minutes to hydrate the oats and thicken slightly.
Scoop 1-teaspoon mounds, spacing 3 inches apart to allow spreading.
Bake 6–8 minutes, until deep golden with set edges and a lacy center.
Cool on the sheet 5 minutes to firm, then transfer to a rack. Cool pans between batches.
Notes
For a fun finish, drizzle cooled cookies with melted dark chocolate or sandwich two around a spoonful of ganache. Store airtight at room temperature with parchment between layers for up to 4 days; if they soften, re-crisp on a sheet pan at 300°F for 3–4 minutes.This recipe is an original creation inspired by classic Easy Oatmeal Lace Cookies flavors. All ingredient ratios and instructions are independently developed.