Preheat oven to 350 and line a baking sheet with parchment paper.
Add the softened butter, all purpose flour, bread flour, vanilla, salt, baking soda, baking powder, cinnamon, granulated sugar, and brown sugar to a stand mixer bowl. Mix on medium low until everything is combined and the mixture looks sandy and uniform.
1 stick butter, 1 cup all purpose flour, 3/4 cup bread flour, 1 teaspoon vanilla, 1/2 teaspoon salt, 1 teaspoon baking soda, 1 teaspoon baking powder, 3/4 teaspoon cinnamon, 1/3 cup granulated sugar, 1/3 cup brown sugar
Add the egg and egg yolk. Mix again until the dough comes together into a smooth, soft mass. Scrape the bowl if anything sticks to the sides.
1 egg, 1 egg yolk
Pour in the chocolate chips and fold them into the dough until evenly incorporated. Use low speed or a spatula to avoid overmixing.
1 1/2 cups chocolate chips
Scoop portions of dough onto the prepared baking sheet. They should be spaced slightly apart since they will spread just a bit.
Bake for 10 minutes, or until the edges look set and the tops no longer appear glossy. The centers will be soft, which is perfect.
Let the cookies cool on the baking sheet for a couple of minutes, then transfer them to a cooling rack to cool completely.
Notes
Substitutions: Replace bread flour with more all purpose flour if needed. Allergy friendly chocolate chips can be used.
Storage: Store in an airtight container up to 4 days at room temperature.