INGREDIENTS
1 cup
all-purpose flour
1/4 cup
cocoa powder
1/4 tsp
baking soda
1/4 tsp
baking powder
1/4 tsp
salt
8 tbsp
unsalted butter (at room temperature)
3/4 cup
sugar
1
egg
1
egg yolk
1/2 tsp
vanilla extract
1/2 cup
buttermilk
2 oz
bittersweet chocolate (melted and cooled)
12
Ferrero Rocher candies (unwrapped)
2 sticks
unsalted butter (softened and cut into cubes)
4 cups
confectioners’ sugar
1 tbsp
heavy cream
2 tsp
pure vanilla extract
1/2 cup
Nutella or other chocolate-hazelnut spread
salt