For 45–60 minutes, remove the butter. It will be cool but not soft like room temperature.Sift flour, baking soda, salt, cornstarch, and cinnamon into a basin. Set aside.
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Beat butter, brown sugar, and sugar with a mixer. Beat high for 2 minutes. Scrape bowl and add eggs and vanilla. Mix for 1 minute on medium-high. The texture will be light.Mix in dry ingredients. Low-mix until barely blended.
2
Relax for 30 minutes. If dough is too soft to roll, freeze for 15 minutes. Wrap two cookie sheets with parchment. Use a 3oz cookie scoop to scoop dough. Cookie dough balls should be 3oz. 3.3oz will spread too much.
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Shape into a disk by hand. Put plenty of chocolate on top. Photo above. Revert to ball.Mix sugar and cinnamon. Roll biscuit balls with cinnamon sugar. Take 30 more minutes to chill.
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Preheat oven to 350°F. Baking 6 cookies takes 13-15 minutes. Cookie edges should be gently browned to finish. The middle will be incomplete.Keep the cookies on the hot pan for 5 minutes. Coat cooked biscuits with cinnamon sugar. Wire-rack awesome.
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