Add softened butter to a large mixing bowl with the brown sugar. Mix with an electric hand mixer or paddle attachment of a stand mixer until light and fluffy.
Add the egg and vanilla extract to the bowl and mix again.
In a separate bowl combine all purpose flour, oats and baking soda. Mix together and pour dry ingredients into the bowl with the wet ingredients. Mix again with the mixer until evenly combined.
Fold chocolate chips into the batter with a flat spatula.
Cover dough and place in the fridge to chill for at least 1 hour.
Preheat oven to 350F and line 2 baking sheets with parchment paper.
Use a 2 tbsp cookie scoop to scoop dough balls onto lined baking sheets top with more chocolate chips if desired. Leave space between each dough ball.
Bake at 350F for 13 -15 minutes. Top with flakey sea salt if desired and cool on the sheet pan for a few minutes before transferring to a wire rack to cool completely.
** Bake from Frozen: roll into dough balls and freeze in balls. Bake directly from frozen at 325F for 17-18 minutes.
Notes
Freezer Instructions:
Freeze before baking - scoop into balls and place on a lined baking sheet to freeze fully before transferring to an airtight freezer safe container. Bake from frozen at 325F for 17-18 minutes.
Freeze after baking - cool completely and transfer to an airtight freezer safe container. Allow to thaw in the fridge or on the counter. Warm gently in the oven or toaster oven at 250F for 4 minutes if desired.