Preheat your oven to 350°F (175°C) and grease two 9-inch round cake pans.
In a large bowl, cream together the softened butter and sugar until light and fluffy.
Beat in the eggs one at a time, ensuring each is fully incorporated.
Add the vanilla extract and mix well.
In another bowl, whisk together the flour and baking powder.
Gradually add the dry ingredients to the butter mixture, alternating with milk.
Fold in the fresh raspberries gently to avoid breaking them.
Divide the batter evenly between the prepared cake pans.
Bake in the preheated oven for 25-30 minutes, or until a toothpick comes out clean.
Allow cakes to cool in the pans for 10 minutes before transferring to wire racks to cool completely.