In a large bowl, melt the butter for 45 seconds, stir, then 10 second increments thereafter and stir each time. Let cool for 5 minutes
In the bowl, stir in both sugars until incorporated.
Add in the eggs, one at a time until combined.
Stir in the vanilla and maple syrup
In a separate bowl, whisk together flour, cornstarch, baking powder, baking soda, and salt.
Gradually add flour mixture to wet ingredients, stirring until completely combined.Note: its easier if you add in about ½ cup at a time
Stir in chocolate chips
Cover bowl with plastic wrap and chill in fridge for at least 30 minutes
Pre-heat oven to 350F (175C°). Note: do not start the next step until the oven is pre-heated, cookies need to go in cold
Scoop ~2½ tbsp of cookie dough (one scoop of a cookie scooper) and roll into a tall ball (i.e. taller than wider). Place them at least 2 inches apart on parchment lined cookie sheet.
Bake for 13 minutes. While baking keep dough in fridge to stay cold.
Cool cookies on pan for at least 10 minutes. Transfer to wire rack to finish cooling.
Repeat steps 10-13 until all the cookies are made.Note: remember to keep cookie dough in the fridge while baking, and don't leave cookie dough on a warm/hot pan, do next round of scooping right before putting it in the oven