Using an electric mixer, beat butter until it is fluffy
Add in both brown and white sugar and cream them with the butter.
Beat in the egg. Add vanilla.
In a separate bowl, sift together flour, cocoa powder, baking soda, corn starch.
Add the dry ingredients to the butter mixture and mix until blended.
Add chocolate chips. Using a spatula or a whisk, carefully mix them into the batter
Scoop out your dough into balls of equal sizes on a baking tray lined with baking sheet. Press them lightly with your fingers. Dollop one teaspoon on dulce de leche on the cookies and sprinkle with sea salt. Refrigerate for at least 30 minutes.
Preheat your oven to 170C
Bake for about 12-15 minutes or until the edges become golden brown.
After taking them out of the oven, let them rest on the baking tray for at least 10 minutes
Recipe by Bake with Shivesh at https://bakewithshivesh.com/chocolate-cookies/