Preheat the Oven: Preheat your oven to 375°F (190°C) and line a 12-cup muffin tin with paper liners or lightly grease it.
- Mix Dry Ingredients: In a large bowl, whisk together the flour, granulated sugar, baking powder, baking soda, and salt.
- Mix Wet Ingredients: In a separate bowl, whisk together the melted butter, egg, milk, and vanilla extract until well combined.
- Combine Wet and Dry Ingredients: Pour the wet ingredients into the dry ingredients and gently stir until just combined. Be careful not to overmix, as this can result in dense muffins.
- Fold in the Strawberries: Gently fold in the chopped strawberries until evenly distributed throughout the batter.
- Fill Muffin Tin: Divide the batter evenly between the muffin cups, filling each about 2/3 full. Sprinkle a little sugar on top of each muffin for a slight crunch (optional).
- Bake: Bake for 18-22 minutes, or until a toothpick inserted into the center of a muffin comes out clean or with a few moist crumbs.
- Cool: Let the muffins cool in the tin for 5 minutes, then transfer them to a wire rack to cool completely.