Preheat your oven to 375°F (190°C) and line a muffin tin with paper liners.
In a large mixing bowl, whisk together the flour, sugar, baking powder, and salt.
In another bowl, combine the milk, vegetable oil, vanilla extract, and egg. Mix well.
Pour the wet ingredients into the dry ingredients and stir until just combined. Do not overmix.
Gently fold in the chopped strawberries.
Divide the batter evenly among the muffin cups, filling each about ⅔ full.
Bake for 20-25 minutes, or until a toothpick inserted into the center comes out clean.
Allow the muffins to cool in the tin for 5 minutes, then transfer to a wire rack to cool completely.