1 large egg, room temperature
1/2 cup unsalted butter, softened
1 cup light brown sugar, packed
2 teaspoons vanilla extract
1 1/2 cups whole rolled old-fashioned oats (not quick cook)
2 teaspoons+ ground cinnamon, or to taste
1/2 teaspoon baking soda
1/4 teaspoon salt, optional and to taste
3/4 cup plus 2 tablespoons bread flour (or, 1 cup minus two tablespoons)
1 1/2 cups chocolate chips (or more if desired)
- To the bowl of a stand mixer fitted with the paddle attachment, add the butter, egg, brown sugar, vanilla, and beat on medium-high speed to cream ingredients until very light and fluffy, 4 to 5 minutes. Stop, scrape down the sides of the bowl, and add the oats, cinnamon, baking soda, optional salt, and beat to incorporate, about 1 minute. Add the flour and beat to just incorporate, about 30 seconds. Add the chocolate chips and beat momentarily to incorporate. Transfer mixture to an airtight container or cover mixing bowl with plastic wrap and refrigerate dough for at least two hours, up to 5 days. If you're going to chill these cookies longer than a couple of hours, portion into dough into golf-sized cookie balls first then freeze. Do not bake these cookies with dough that has not been properly chilled because they will spread.
- Preheat oven to 350F, line 2 baking sheets with parchment paper; set aside. Place dough balls on baking sheet, spaced at least 2 inches apart (maximum of 8 per sheet). Bake for 10 to 12 minutes, or until edges are set and tops have just set, even if slightly undercooked in the center, as cookies will firm up as they cool. It's a little tricky to judge doneness because of all the oats, but I suggest the lower end of the baking range and baking for 10 minutes for soft and chewy cookies. For crunchier cookies, extend baking time by 1 to 2 minutes, but take care not to overbake or they will be hard.
- Allow cookies to cool on the baking sheet for 5 minutes before removing. Store cookies in an airtight container at room temperature for up to 5 days, or in the freezer for up to 3 months. Alternatively, unbaked dough can be stored in an airtight container in the refrigerator for up to 5 days, or in the freezer for up to 3 months, so consider baking only as many cookies as desired and save the remaining dough to be baked in the future when desired.