preheat oven to 350 degrees.Weigh or lightly spoon flour into a dry measuring cup; level with a knife. Combine flour, baking powder, and salt in medium bowl; stir with a whisk until thoroughly combined.
Combine butterscotch morsels and half an half in a medium microwave safe bowl; microwave on high for 45 seconds, stirring every 15 seconds. stir until smooth. Add brown sugar, canola oil, butter, vanilla, and eggs, beat with a mixer on high 2 minutes. Add flour mixture to butterscotch mixture, stirring just until combined. stir in chocolate chips.
pour batter into a 8-inch square metle baking pan coated with cooking spray. bake for 40 min or until a wooden pick inserted in center comes out with clinging. cool in pan . serve