Preheat the oven to 375°F (190°C) and line a muffin tin with paper liners.
In a large bowl, whisk together the flour, sugar, baking powder, baking soda, and salt.
In a separate bowl, mix the egg, milk, vegetable oil, and vanilla extract.
Pour the wet ingredients into the dry ingredients and stir until just combined.
Gently fold in the fresh raspberries.
Scoop the batter into the prepared muffin tin, filling each cup about 2/3 full.
Bake for 18-20 minutes or until a toothpick inserted comes out clean.
Allow the muffins to cool in the tin for 5 minutes before transferring them to a wire rack.
Dust with powdered sugar if desired before serving.
Enjoy warm or at room temperature!