Preheat oven to 350ºF.
In a small bowl, add the oats and baking soda. Mix well until combined, and set aside.
In a medium bowl, whisk the peanut butter, brown sugar, eggs, and vanilla for about 5 minutes or so.
Add the dry ingredients, and mix all the ingredients together.
Add the chocolate chips.
Place a silicone mat or parchment paper on a baking sheet.
Scoop out 1 tablespoon of the batter onto the sheet 2 inches apart.
Then, flatten the top of the cookie with two fingers.
Bake for 9-11 minutes, and let them cool completely before removing from the baking sheet. If you don't, the cookies may break apart.
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