Ingredients
Method
Meringue Cookie
- In a stand mixer with a whisk attachment, whisk egg whites on high speed until soft peak forms, around 1-2 minutes.
- Slowly add in 1/3 of the powdered sugar, one spoonful at a time.
- Once soft peaks have formed (the egg whites are fluffy, but droop down when you lift your whisk), add the vinegar. Then continue adding in the rest of the powdered sugar one spoonful at a time, until all the sugar has been mixed in.
- Whisk until egg whites have formed stiff peaks and look glossy (the mixture will stand up straight and look pointy when you lift your whisk).
- Add 1/3 of the ground walnuts (or almonds) into the egg white mixture, and gently fold until fully incorporated. Repeat this process until all the nuts have been folded in.
- Preheat the oven to 300℉ (150℃) and line a baking tray with parchment paper.
- Using a spoon or piping bag, drop meringue into little circles on the parchment paper, spaced about 2 inches apart.
- Bake for 25 minutes, then turn off the oven. Use a wooden spoon to keep the oven door cracked open, allowing the cookies to sit in the oven for another 25 minutes before removing from the oven.
Chocolate Custard
- In a small saucepan over very low heat, whisk together the egg yolks and powdered sugar. You want the heat as low as possible AND you need to constantly stir without stopping so it does not curdle. Alternatively, if you are experienced, you can use a bain marie.
- Once combined, add the chocolate and mix until melted.
- Turn off the heat and add the butter, and whisk until fully incorporated. Allow the custard to fully cool before using.
- Push the custard through a sieve to remove lumps. Allow the custard to fully cool to room temperature before using. You can put in the refrigerator to accelerate the process but if you go past room temperature it will be harder to pipe.
Assembly
- Place chocolate custard inside piping bag, and pipe an even layer onto a meringue cookie (you may also just use a knife or spoon to spread the filling) Place another cookie on top to make a cookie sandwich.
- Enjoy!