Grind oats in a small food processor until they turn into powdery flour.
Transfer 2 1/4 cups oat flour to a medium bowl and whisk in baking soda, salt, and cinnamon.
Beat butter, brown sugar, and white sugar in a stand mixer fitted with the paddle attachment until light and fluffy. Mix in egg, vanilla, and lemon juice until smooth. Add oat mixture and mix until combined. Stir in chocolate chips and pecans.
Line a cookie sheet with parchment paper. Scoop tablespoons of dough onto the prepared cookie sheet. Cover and chill in the refrigerator 4 to 8 hours before baking.
When ready to bake, preheat the oven to 350 degrees F (175 degrees C).
Remove dough from the refrigerator and transfer cookies to new parchment-lined baking sheets, spacing them 2 inches apart.
Bake in the preheated oven for 8 to 12 minutes; 8 minutes will yield a softer cookie, while 12 minutes will yield a drier cookie.
Cool on the baking sheet briefly before removing to a wire rack to cool completely.
Nutritional Facts
Per 24 servings
Calories: 159
Carbohydrate: 20g
Fat: 8g
Fiber: 2g
Protein: 2g
Sugar: 13g
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