Preheat the oven to 350℉/180℃. Line 2 baking trays with parchment paper and set aside. Melt the butter and allow it to cool as you prep the rest of the ingredients.
3/4 cups butter
In a bowl add the flour, baking soda, cornstarch, and cinnamon. Stir to combine and set aside.
1 1/2 cups all-purpose flour, 1 tsp baking soda, 2 tsp cornstarch, 1/4 tsp cinnamon
In a large bowl, add in the melted butter, brown sugar, and white sugar. Whisk for 2-3 minutes until combined.
2/3 cups dark brown sugar, 1/3 cup white sugar, 3/4 cups butter
Add in the peanut butter, and whisk until smooth.
3/4 cups creamy peanut butter
Add in the egg and vanilla, and continue whisking for another minute or so until well combined.
1 large egg, 1 tbsp vanilla
Combine the dry and wet ingredients gently with a spatula just until a soft cookie dough forms. Do not over-mix!
Add in the chocolate chips, and mix in a few times just until evenly distributed. Do not over-mix!
3/4 cups semi-sweet chocolate chips
Scoop the cookies 6 at a time on the baking tray. Add extra chocolate chips on top (optional).
Bake for 13-16 minutes. The cookies are ready when the edges are a golden brown and the middle is still slightly puffy. Allow to cool, and enjoy!