Preheat your oven to 375°F (190°C). Grease the muffin tin or line it with paper liners.
In a large mixing bowl, whisk together the flour, sugar, baking powder, and salt until well combined.
In another bowl, mix the melted butter, milk, eggs, and vanilla extract until smooth.
Pour the wet ingredients into the dry ingredients. Stir until just combined; be careful not to overmix. The batter should be slightly lumpy.
Gently fold in the chopped strawberries until evenly distributed.
Divide the batter evenly among the prepared muffin cups, filling each about two-thirds full.
Bake in the preheated oven for 18-20 minutes or until a toothpick inserted into the center comes out clean.
Allow the muffins to cool in the pan for 5 minutes before transferring them to a wire rack to cool completely.
For added flavor, you can sprinkle a little sugar on top of the muffins before baking.
Store the muffins in an airtight container for up to 3 days.