Preheat the oven to 350°F/180°C, and line 2 cookie sheets with parchment paper or silpat mat. Set aside.
Combine dry ingredients: In a bowl combine oats with flour, baking powder and soda, and salt. Set aside.
In a separate bowl, using a hand held mixer cream butter and peanut butter, with sugars, eggs, and vanilla until well combined (1 minute).
Fold in the chocolate chips.
Using a small or medium cookie scoop, drop cookie dough onto the prepared cookie sheet 2 inches apart.
Bake small cookies for 11 minutes, or medium ones for 14 minutes.
Remove onto a wire rack to cool completely.
Notes
To store: These oatmeal peanut butter cookies will stay fresh at room temperature in an airtight container for up to 5 days. Cookies can be frozen for storage up to 3 months.
Swap out the semi-sweet chocolate chips for your favorite style of baking chips if desired. Butterscotch or white chocolate would be tasty.
Don't use all-natural peanut butter to make these cookies. The consistency of regular creamy peanut butter is needed for this recipe.