Step 1: Preheat your oven to 350°F (175°C).
Step 2: Line a 9x13 inch baking pan with parchment paper.
Step 3: In a large mixing bowl, whisk together the oats, flour, brown sugar, granulated sugar, baking soda, and salt.
Step 4: In another bowl, whisk together the canola oil, eggs, and vanilla extract.
Step 5: Pour the wet ingredients into the dry ingredients and stir until just combined.
Step 6: Fold in the chocolate chips and Reese’s Pieces or M&Ms.
Step 7: Spread the batter into the prepared pan and bake for 25-30 minutes.
Step 8: Let cool completely before lifting out and slicing into bars.