01 -
In a mixing bowl, whisk together all-purpose flour, cocoa powder, powdered sugar, and a pinch of salt. Add the cold, cubed butter and blend with fingertips or a pastry cutter until the mixture resembles coarse crumbs. Incorporate the egg yolk, then add cold milk one tablespoon at a time until a dough forms. Shape into a disc, wrap, and chill for at least 30 minutes.
02 -
Preheat oven to 350°F (175°C). Roll out the chilled dough and fit into a 9-inch tart pan. Trim excess dough and prick the base with a fork. Line with parchment and fill with pie weights or dried beans. Bake for 15 minutes, remove the weights and parchment, then bake an additional 10 minutes. Allow the tart shell to cool fully before filling.
03 -
Heat heavy cream in a small saucepan until it just begins to simmer. Pour over chopped dark chocolate in a separate bowl and let stand for 2 minutes. Stir until smooth, then add vanilla extract and a pinch of salt. Pour the ganache into the cooled tart shell and chill for 30 minutes or until set.
04 -
In a blender or food processor, blend shelled pistachios with whole milk until creamy. Transfer to a saucepan, add heavy cream, granulated sugar, and cornstarch. Cook over medium heat, stirring continuously, until mixture thickens to a custard-like texture. Remove from heat, stir in almond extract if desired, and cool for 5–10 minutes. Fold in about 1/3 cup whole roasted pistachios. Evenly spread over ganache layer. Refrigerate for 30 to 45 minutes.
05 -
Heat heavy cream until simmering. Pour over chopped dark chocolate and butter in a bowl. Stir until ganache is glossy and smooth. Gently pour over pistachio layer and smooth the surface with a spatula.
06 -
Sprinkle chopped or whole roasted pistachios around the tart's edge for visual appeal. Refrigerate for at least 1 hour before slicing to ensure distinct layers.