These oat flour cookies are soft and chewy on the insides, with slightly crisp edges and a ton of gooey chocolatey chunks inside. Easy to make, with just 9 simple ingredients and no chill time!
Preheat oven to 350°F and line 2 baking sheets with parchment paper.
In the bowl of a standing mixer with the paddle attachment or a handheld mixer, beat butter, brown sugar, and granulated sugar, mixing until light and fluffy (1-2 minutes).
Add in the egg and vanilla extract, and beat until just combined (do not over-mix!).
Add in the dry ingredients (oat flour, baking soda, and salt) until a dough forms. Stir in the chocolate and mix until just combined.
Use a medium cookie scoop to make 1.5 Tablespoon sized balls and place them on the baking sheet around 3-4 inches apart, leaving the cookies some room to spread.
Bake the cookies (one sheet at a time for even baking) for 8-11 minutes. Remove them from the oven when the edges look set. They will look under-baked in the middle! Sprinkle flaked sea salt over the cookies if desired. Let the cookies cool on the baking sheet for 10-15 minutes, then transfer to a cooling rack to cool completely. Enjoy!
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Notes
MEASURING FLOUR: Properly measure your oat flour using either a kitchen scale or by fluffing it up in the bag with a fork, then using a spoon to scoop the flour into the measuring cup and then use the back of a butterknife to level it off (the is the scoop and level method)CHOCOLATE CHIPS: You can use any kind of chocolate chips here. I like to use semisweet or dark. You can also use a chopped up chocolate bar or even white chocolate chips.Storage and Freezing:Store the cookies in an airtight container or ziploc bag at room temperature for 5-6 days.The baked cookies can be frozen in a freezer bag for up to 2 months. Thaw at room temperature when you're ready to eat them.Freezing the cookie dough: To freeze the dough and bake later, use a cookie scoop to scoop the dough onto a baking sheet and place in the freezer. Once they are firm but not frozen completely, transfer to a plastic freezer bag if desired, then freeze up to 2 months.