1 cup + 2 Tbsp flour
1/2 tsp baking soda
1/4 tsp salt
1 stick of butter (8 oz a.k.a. 1/4 lb), softened
6 Tbsp brown sugar
6 Tbsp granualted sugar OR Stevia sugar substitute
1 egg
1 tsp mint extract
1 cup good chocolate chips (the better the chips, the better the cookies)
Combine the flour, baking soda, and salt in a small bowl and set aside.
In a mixing bowl, add the butter and sugars. Using a hand mixer, cream the butter and sugar together on high. The end result will be light and fluffy and only slightly tan. If the butter is at room temperature, it shouldn't take more than 3-5 minutes. If you beat them together longer, you will end up with flatter, more spread out cookies. For a more cakey cookie, beat until everything is just creamed together and fluffy. Add the egg and the extract, and beat on medium until everything just comes together.
Add 1/2 of the flour mixture to the butter mixture and mix together. Add the rest of the flour mixture and stir together until the dough forms. I wouldn't recommend using the electric hand-mixer for this bit, because if you over-mix the dough, gluten will form and you will get tougher cookies. Add the chocolate chips and stir to combine.
At this point, turn the oven on to 375. This will give the flour in the dough a little more chance to soak up moisture from the egg. If you wanted, you could refrigerate the dough for up to 2 days if you covered it in plastic wrap. But let's face it -- who wants to wait 2 days to eat cookies that you're making the dough for today?
When the oven has heated, put the pan(s) in and cook for 9-11 minutes, or until the edges are nicely browned. Remove from the oven, and let them sit on the pan for 2 minutes. This will let the insides finish cooking and keep them from falling apart when you take them off the pan. Remove the cookies to a cooking rack and allow to cool completely (about 10 minutes). If you try to eat one now, you'll end up with a mouthful of molten chocolate chips.