Dubai Chocolate Pistachio Bar Cake

How to do ?

3 Eggs, large

1 tbsp Honey

1/2 cup 100g white chocolate

3/4 cup 150g brown sugar

1 cup 175g milk chocolate

1 cup 200g granulated sugar

2 cups 250g all-purpose flour

1/4 cup 30g powdered sugar

3/4 cup 75g cocoa powder

2 tsp Baking powder

1 tsp Baking soda

1/2 tsp Sea salt

2 tsp Vanilla extract

1 1/2 cup Vegetable oil

1 1/4 cup Pistachio

1 1/8 cup Espresso or strong coffee, hot

1 cup 225g mascarpone cheese

3 tbsp Butter, unsalted

2 1/8 cup Buttermilk

2 1/8 cup Heavy cream

1 tsp Rosewater

Edible gold dust or gold leaf

1 cup Shredded kunafa (kataifi pastry)