Preheat the oven to 355˚
butter two 8 inch cake pans, 9 inch will work too
add the butter to the bowl of a stand mixer, stir with the paddle until the butter is smooth
add the sugar and mix until combined
add the eggs, one a time, mixing well after each egg
stir the flour, salt and baking powder then add to the butter mixture
mix on low to start with, then switch to medium and mix for about 1 minute or until all the ingredients are well combined
do not over mix the batter, do not beat it on high
divide evenly between the prepared pans, the batter is thick
bake in the preheated oven 20-25 minutes or until the cakes spring back when you poke them, check at 20 but it could take the entire 25 minutes-22 minutes was my magic number
cool five minutes and then remove from the pan
cool completely
if you're using buttercream make it now--whip the butter and sugar together and add enough vanilla to make it easily pipe-able OR spreadable
to serve lay one cake on the cake stand, top-down
spread jam and whipped cream or buttercream over the top of the cake
place the second cake on top, top or bottom side up, your preference here
sprinkle over with sugar or caster sugar if desired
serve with more whipped cream if you like