Chocolate Mousse Cake

INGREDIENTS

Bottom Layer

6 tbsp

unsalted butter , cut into 6 pieces, plus extra for greasing pan

7 oz

bittersweet chocolate (, chopped fine (Bittersweet Chocolate))

3/4 tsp

instant espresso powder ((Instant Espresso Powder))

1 1/2 tsp

vanilla extract

large eggs (, separated)

table salt

1/3 cup

packed light brown sugar

Middle Layer

3/4 tsp

powdered gelatin

1 tbsp

water

6 oz

white chocolate chips ((Chocolate Chips))

1 1/2 cups

cold heavy cream

Top Layer

2 tbsp

cocoa powder (, preferably Dutch-processed)

5 tbsp

hot water

7 oz

bittersweet chocolate (, chopped fine (Bittersweet Chocolate))

1 1/2 cups

cold heavy cream

1 tbsp

granulated sugar

1/8 tsp

table salt

Garnish

Shaved chocolate and/or cocoa powder ((above))

Dark Chocolate Curls

White Chocolate Curls

Cocoa Powder