Preheat your oven to 350°F (175°C) and grease two 9-inch round cake pans.
In a large bowl, cream together the butter and sugar until light and fluffy.
Add the eggs one at a time, mixing well after each addition.
Stir in the vanilla extract.
In another bowl, sift together the flour and baking powder.
Gradually add the dry ingredients to the wet mixture, alternating with milk.
Mix until just combined and smooth.
Pour the batter evenly into the prepared pans.
Bake for 25-30 minutes, or until a toothpick inserted comes out clean.
Let the cakes cool in the pans for 10 minutes, then turn them out onto wire racks to cool completely.
Spread whipped cream between the layers and on top, then decorate with fresh berries.