Preheat the oven to 350°F (175°C).

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.

In another bowl, combine the flour and baking powder.

Gradually add the dry ingredients to the wet mixture, alternating with milk.

Fold in the sliced strawberries.

Pour the batter into a greased baking pan.

Bake for 30 minutes or until a toothpick comes out clean.

Let the cake cool before serving.