In a bowl put your butter mix until it is soften add your vanilla extract whisk well add your sugar mix until fluffy add your egg one at a time add your flour,baking powder mix gradually add your milk mix until everything is incorprated.

Pour into your greased pan.

Bake for 35-40 minutes.

Set aside for it too cool for 5-10 minutes.

For frosting:
Leave the butter in room temperature,then beat together with icing sugar and along with your vanilla extract mix until everything is incorporated.

Cut your cake into three layer
First layer add your frosting and spread add your second layer add icing spread add your last layer frost the body smoothen with your icing comb divide your remaining frosting add coloring in the two of them(purple and green)add your purple frosting in your icing bag And insert your nozzle make some rose around then add green frosting.

Pour melted chocolate into a piping bag cut a small hole use to write happy birthday and put point all over the cake.

Enjoy!!