Using an electric mixer, beat butter until it is fluffy
Add in both brown and cream it with the butter.
Beat in the condensed milk. Add vanilla.
In a separate bowl, mix together flour, baking soda and corn starch.
Add the dry ingredients to the butter mixture and mix until blended.
Add chocolate chunks and walnuts. Using a spatula or a whisk, carefully mix them into the batter.
Spread the dough on a skillet. Generously sprinkle with sea salt. Place the skillet on the baking tray and bake for 15-20 minutes or until the edges of the pizookie become golden brown.
Recipe by Bake with Shivesh at https://bakewithshivesh.com/eggless-pizookie/