Preheat the oven to 325F, grease a bundt cake with butter generously, dust the pan with the flour and remove the excess the flour once the pan gets well coated with the flour.
Sift the flour with baking powder, baking soda, keep aside.
Take the butter, sugar in a bowl, beat well until the mixture turns pale and fluffy.
Slowly add the eggs, beat for a while, add in the sifted flour,vanilla extract, butter milk and mix well until the batter turns smooth.
Pour the batter to the greased mould and bake for 60-65minutes or until the skewer inserted comes out clean.
Meanwhile, take the ingredients for the sauce in a pan, heat in low flame until the sugar gets completely dissolved.
Remove the cake from the oven, poke holes with a skewer, pour immediately the butter sauce, let the cake sit in kitchen counter, until it gets cool completely.
Transfer the cake to a plate, dust it with powdered sugar generously.
Slice and enjoy with your favourite drink.