Sour Cherry Chocolate Mousse Cake

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Details

17 Ingredients

• 3/4 cup sour cherry jam or preserves
• 1 Tbsp balsamic vinegar
• 2 Tbsps calvados (or other type of brandy)
• 2 Tbsps hazelnuts, toasted and skins rubbed off
• 3 Tbsps sugar
• 1/2 cup all-purpose flour
• 1/2 stick (1/4 cup) unsalted butter, softened
• 2 Tbsps unsweetened Dutch-process cocoa powder
• 1/8 tsp salt
• 1 tsp unflavored gelatin (from a 1/4-oz envelope)
• 3 Tbsps cold water
• 1/2 cup chocolate hazelnut spread such as Nutella (5 oz)
• 1/2 cup mascarpone (1/4 lb)
• 1 1/2 cups chilled heavy cream
• 1/4 cup plus 1 Tbsp heavy cream
• 3 1/2 oz fine-quality bittersweet chocolate (not unsweetened), chopped
• Special equipment: an 8-inch (20-cm) springform pan; parchment paper