Preheat oven to 375 degrees, line baking sheets with parchment paper
Heat butter and brown sugar in saucepan over medium heat, stir until butter has melted and mixture is smooth. Remove from heat and let sit for 2 mins. Stir in oats, flour, salt, egg and vanilla.
Drop about a tablespoon of batter onto cookie sheets leaving at least 2-3 inches in between cookies. Bake for 5-7 mins, just until the edges of the cookies start to caramelize. Allow the cookies to cool for a few mins. then flip one over, add a hand full of chocolate chips and then put another cookie on top of the chips. Let it sit for a few mins then press down when the chips are melted.
Recipe by THE SEMISWEET SISTERS at https://www.thesemisweetsisters.com/2015/06/15/old-fashioned-oatmeal-lace-cookies-with-chocolate/