Using an hand mixer or stand mixer, beat together the sugar, butter and oil on medium-high speed for 5 minutes or until it is fluffy and aerated, scraping down the sides as needed.
Whisk in the whole milk, scraping down the sides as needed. Add the dry ingredients to the wet ingredients, and stir until fully combined and you achieve a thick, lump free batter.
Dice the strawberries into small pieces roughly the size of blueberries. Fold the diced strawberries and white chocolate chips into the batter until evenly distributed.