INGREDIENTS
1 1/2 cups
unsalted butter
12 oz
60% cocoa bittersweet chocolate
6
large eggs
1 tbsp
plus 1 teaspoon McCormick's Pure Vanilla Extract
1 2/3 cups
sugar
1 1/2 cups
all-purpose flour
1 tsp
salt
1 1/2 cups
chopped hazelnuts, toasted
1
egg yolk
1 tbsp
flour
2 tbsp
sugar
8 oz
mascarpone cheese