Preheat the oven to 180ºC and line your baking tray with parchment paper
In a small bowl, sift the flour and baking soda and set aside.
In another bowl, combine the butter and both sugars and whisk together for at least 5 minutes.
Add the egg, salt and vanilla extract. and whisk for until 1-2 minutes.
Now add the flour and baking soda mixture, and mix until just combined.
Stir in the chocolate chips/chunks
Drop heaping tablespoon-size balls of dough about 2 inches apart on your baking tray
Bake until cookies are golden around the edges, but still soft in the center, for about 10 to 12 minutes.
Remove from the oven, and let them cool completely, for at least 30 minutes.
Store the cookies in an airtight container at room temperature for upto 1 week
