In a mixer beat soft butter and salt creamy for 4 mins then add the vanilla compound and the eggs slowly and mix another minute until creamy.
Add honey then sift cake flour and baking powder and fold slowly inside by hand.
Take half out and add cocoa powder and mix well.
Place booth mixes in a piping bag and pipe inside the baking thin layer out with parchment paper and use stick to marble it and bake at 200°C for 15 mins first then 160°C for another 20 mins.