Step 1: Preheat your oven to 350°F (175°C) to ensure even baking.
Step 2: Line your 9x13 inch baking pan with parchment paper, leaving overhang for easy removal.
Step 3: Beat the butter with the brown sugar and granulated sugar until light and fluffy (2-3 minutes).
Step 4: Add the eggs one at a time, mixing well, then stir in the vanilla extract.
Step 5: Whisk together the flour, salt, baking soda, and baking powder, then gradually add to the wet ingredients.
Step 6: Fold in the oats and chocolate chips until evenly distributed.
Step 7: Transfer the batter to the prepared baking pan and spread evenly.
Step 8: Bake for 25-30 minutes until golden brown and a toothpick comes out clean.
Step 9: Cool in the pan for 10 minutes, then lift out and cool completely on a wire rack before slicing.
