Fat Chewy Chocolate Chip Cookie

I found this recipe off allrecipes, like so many other good ones, based on its impressive rating and reviews. Many were heralding it as the "most amazing cookie ever" and "the kind of cookie you get in a bakery but can never make at home". I copied it as written on the website and prayed for a worthy product. It was very delicious - nicely crunchy on the outside, but good chewyness on the inside. Not the most amazing cookie I've ever had, but very very delicious nonetheless.
Prepare:
-Melt 170g (3/4 cup) of unsalted butter (I used salted and didn't add the salt later on)
-Cream1 cup brown sugar, 1/2 cup white sugar into the bowl with the butter -In a small bowl, beat 1 egg and an additional yolk, mixing in 1tbsp vanilla essence-In a large bowl, sift 2 cup plain or all-purpose flour with 1/2tsp of baking soda and 1/2tsp of salt (skip if used salted butter)
-Mix the 3 bowls together... not too much, though, just until more or less blended
-Fold in as many chocolate chips as you'd like-Refrigerate for about 40 minutes
Cook:
-Roll dough into balls... using 1/4cup measuring spoon gets you a nice big cookie
-Space evenly on a baking pan lined with ungreased baking paper (this is important)
-Bake at 350F/160C for about 15-20 minutes, or until outsides start to turn brown but inside is still soft
-Let sit outside, on cookie sheet, for a couple minutes to finish cooling. Eat!Tips:
-I made these at a friend's house with aluminum foil instead of baking paper and it turned out plain wrong! Use baking paper
-The time is weird... according to the recipe, it called for 15 minutes or less, but mine took closer to 25 or 30 minutes to cook. It depends on the size of the cookie and the efficiency of your oven, I suppose
-You can make the batch, and separate it into rolls (wrap in baking paper and then cling wrap/plastic bag) for freezing - then when you want a cookie or two, just cut off from the loaf and bake in a toaster oven!-Substitute chocolate chips for chunks, or any other flavor (butterscotch, white, peanut butter) chips, as per desire and availability