Preheat the oven to 350°F (175°C). Grease and line a baking pan with parchment paper.

In a mixing bowl, combine the flour, oats, baking soda, and salt. Mix well and set aside.

In another bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy.

Add the egg and vanilla extract to the butter mixture and mix until well combined.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Fold in the chocolate chips.

Spread the batter evenly into the prepared baking pan.

Bake in the preheated oven for 20-25 minutes or until golden brown and a toothpick inserted in the center comes out clean.

Allow to cool in the pan before cutting into bars.