Ina large mixing bowl (or you can use a stand mixer), use a spatula to cream the Butter with the Brown and Granulated Sugars together well.
When this mixture turns into smooth texture, beat in the Egg and Vanilla Extract, mixing well.
Use a sifter to sift together the Flour, Cornstarch, Baking Soda, and Salt.
Add the dry ingredients into the butter egg mixture and stir until well blended.
Blend in the White and Milk/Dark Chocolate Chips, toasted Pecans/Walnuts, and toasted Coconut Flakes. Be sure to use a blending attachment if you are using a stand mixer so that the nuts and chocolates retain their size.
Use a small tablespoon or an ice cream scoop to shape the cookie dough into a ball and place each one of them onto a parchment lined baking tray or a plate. Chill them in the fridge for at least an hour before baking.
Preheat the oven to 325 F (160 C). Arrange the chilled cookie balls onto parchment-lined baking trays, leaving around 2 or 3 inches space between the cookies—if you want perfectly round ones.
Bake for 15-18 minutes, until browned around the edges. Cool the cookies on the baking tray before taking them out.
Notes
For those who love Soft Chocolate Chip Cookies, you can bake the cookies in preheated oven at 350 F (175 C) for just 10 minutes. Otherwise, just follow my recipe below and see if you like it.
For me, this recipe makes exactly 24 cookies. See for yourself!
If you want your cookies to weigh the same and be round, use a digital scale to weigh the dough before you make them into a ball size, and that is what I do. But homemade cookies of different weights and shapes show themselves in interesting ways. And, you can skip the refrigeration step too.
Once you chill the cookie dough in the fridge, you can also freeze it for baking later.
If you want your cookie to be more crunchy, bake them just a bit longer about 20 minutes.