Preheat your oven to 350°F (175°C). Grease and flour a cake pan.
In a mixing bowl, cream together the butter and sugar until light and fluffy.
Add the eggs one at a time, beating well after each addition. Stir in the vanilla extract.
Combine the flour and baking powder, add to the creamed mixture and mix well. Finally, stir in the milk until the batter is smooth. Fold in the strawberries.
Pour batter into the prepared pan. Bake for 30 minutes, or until a toothpick inserted into the center of the cake comes out clean.
Let the cake cool in the pan for 10 minutes, then turn out onto a wire rack and cool completely.