Preheat oven to 160oC (350oF). Grease and flour 24x8cm bundt pan and set aside.
In a large bowl, combine sugar, flour, cocoa, bi-carb soda, baking powder and salt.
Add eggs, buttermilk, melted butter and vanilla extract. Beat, using a hand mixer, on medium speed for 2 minutes.
Stir in boiling water and mix until fully incorporated.
Pour batter into bundt pan and bake for 40-50 minutes or until an inserted skewer comes out clean.
Cool on a wire rack before removing from pan.
Drizzle melted chocolate and scatter chocolate shavings over the cake. Dust with cocoa powder.
Arrange pretzel sticks in the centre of the cake and top with Easter eggs.