Preheat oven to 350 degrees F. Grease a 9-inch cake pan.
Beat the butter and sugar in a large mixing bowl with an electric mixer on medium speed for 3 minutes or until pale and fluffy.
Add the egg, milk, and vanilla to the bowl and mix till combined.
Stir the flour, baking powder, and salt in a bowl until combined. Then, add half the dry mixture to the wet mixture. Stir, with a spatula, till flour is incorporated. Add the remaining dry mixture and stir to combine. Beat for 1 minute until the batter is fluffy.
Pour the batter into the cake pan and spread till you have an even layer.
Place the strawberries on top in a single layer. Sprinkle the additional 2 teaspoons of sugar on top.
Bake for 50 to 60 minutes. Before removing the cake from the oven, test it with a wooden skewer or cake tester to see if the center is fully baked.
Let the pan cool on a wire rack for at least 20 minutes before removing the cake and cutting.