Preheat oven to 350 degrees.
In a medium bowl, whisk together the flour, sugar, baking soda, baking powder.
Add egg, vanilla, sour cream, and milk and beat on medium speed until smooth.
Fold in chopped strawberries.
Carefully spoon batter into lined muffin tins, filling just over halfway.
Bake for 12-14 minutes, rotating halfway through.
Cool on wire rack.