Nutella Cake

INGREDIENTS

For the cake::

2 1/2 cups

light brown sugar

8 oz

unsweetened chocolate, chopped

2 sticks

unsalted butter

1/3 cup

unsweetened cocoa powder

1/2 cup

Nutella

2 tsp

instant espresso powder (optional)

1 tsp

baking soda

large eggs, at room temperature

3 cups

all-purpose flour

1/4 tsp

fine salt

For the buttercream::

16 oz

unsalted butter, at room temperature

4 cups

powdered sugar, sifted

1 cup

unsweetened cocoa powder, sifted

1 cup

Nutella

1/2 tsp

fine salt

Edible flowers, for decorating