INGREDIENTS
1 1/2 cups
all-purpose flour
1 1/2 cups
granulated sugar
3/4 cup
Dutch-processed cocoa powder (sifted)
1 1/2 tsp
baking soda
1 tsp
baking powder
1 tsp
salt
1/4 cup
vegetable oil
3/4 cup
buttermilk (room temperature)
3/4 cup
hot water (or hot coffee)
2
large eggs (room temperature)
2 tsp
vanilla
6
large egg whites
2 cups
granulated sugar
2 1/2 cups
unsalted butter (cubed, room temperature but still cool)
3/4 cup
Nutella
3/4 cup
Nutella
1/2 cup
heavy cream
chopped hazelnuts ((optional))