Preheat the oven. Preheat your oven to 400°F (200°C), positioning the rack in the center. Then, line a muffin tin with cupcake liners.
Make the batter. Whisk together the vegetable oil, milk, and egg in a large bowl until well combined. Then, combine the flour, sugar, baking powder, and salt in a separate bowl. Gently fold the dry ingredients into the wet mixture until combined—be careful not to overmix.
Prep the strawberries. Pat the chopped strawberries dry with a paper towel. Set aside 3 tablespoons of the strawberries, and toss them with 1 tablespoon of flour. This will help them stay on top of the muffins during baking.
Add the mix-ins. Gently fold the remaining strawberries and the white chocolate chips into the batter, ensuring an even distribution. If you’re worried about the chocolate chips sinking, lightly toss them with a small amount of flour before adding them.
Fill the muffin tins. Scoop the batter evenly into the prepared muffin tin, filling each liner about ¾ of the way full. Then, top each muffin with the floured strawberry pieces and a few extra white chocolate chips. Optionally, sprinkle a bit of sparkling sugar on top for added texture and sweetness.
Bake. Bake for 20-25 minutes, or until a toothpick inserted into the center of a muffin comes out clean or with just a few moist crumbs.
Cool and serve. Remove the muffins from the oven and let them cool in the tin for 5 minutes before transferring to a wire rack to cool completely. Serve warm or at room temperature.