Line a cookie sheet with parchment paper or a silicone mat.
In a mixer, beat together oil, both sugars, eggs, and vanilla.Beat on medium speed for 2-3 minutes until light and fluffy and well mixed.Add in flour, cornstarch, baking soda, and salt. Beat on low until completely mixed.Fold in chocolate chips and raspberries.
Scoop cookie dough with a 3 tbsp cookie scoop or a spoon and place on the cookie sheet.
Bake 10-12 minutes until edges are just set and middle is soft. Let cool on cookie sheet 5 minutes before serving or transferring. Store in an airtight container for 4-5 days.