Easy Milk Chocolate and Vanilla Oatmeal Lace Cookies

1. In a skillet with sides, melt the butter together with the brown sugar over medium heat. Bring to a boil and cook for 1 minute, until the sugar dissolves and looks similar to caramel. Remove from the heat and transfer to a bowl. Whisk in the honey and vanilla, whisking until smooth and glossy. Add the oats, almond flour, and salt mixing until combined. Let cool for 5 minutes, then stir in the egg white. Let the dough sit for 10 minutes to thicken. 
2. Position racks in the upper and lower thirds of the oven. Preheat the oven to 350 degrees F. Line 2 baking sheets with parchment paper.
3. Drop 1 teaspoon-size amount of dough on the prepared baking sheets, placing each one 3 inches apart. Bake for 7-9 minutes until golden brown around the edges. The butter will be bubbling up around the cookies, this is OK. Allow the cookies to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cook completely. 
4. Sandwich each cookie with melted chocolate. Sprinkle with sea salt (if desired). Store cookies in an airtight container for up to 4 days.