Milk Chocolate Pistachio Tart

Ingredients

For the Crust:

• ¾ cup all purpose flour, plus more for dusting
• ¼ cup unsweetened Dutch-process cocoa powder
• ⅓ cup unsalted shelled pistachios, chopped
• ¼ teaspoon salt
• ½ cup (1 stick) unsalted butter, room temperature
• ¼ cup sugar
• ½ teaspoon pure vanilla extract

For the Filling:

• ½ cup heavy cream
• ¼ cup milk
• 5 ounces milk chocolate, finely chopped
• 1 large egg, lightly beaten

For the Pistachio Paste:

• ½ cup unsalted shelled pistachios, preferably Sicilian
• 1 teaspoon safflower oil
• ¼ teaspoon salt
• ¼ cup sugar

Other:

• Finely chopped pistachios, for garnish

Instructions

1. 1
   Make the crust: In a bowl, whisk together flour, cocoa, chopped pistachios, and salt. With an electric mixer on medium speed, beat butter until fluffy, about 3 minutes. Add sugar and continue to beat until pale, about 2 minutes. Reduce speed to low, add vanilla, then beat in flour mixture just until incorporated and dough begins to come together. Gather dough into a ball. Wrap in plastic, pat into a disk, and refrigerate about 1 hour.
2. 2
   Between 2 sheets of plastic wrap, roll out dough to an 11-inch round, ¼ inch thick. Fit into a 9-inch tart pan with removable bottom, patching any tears and folding in excess dough flush with rim of tart pan. Refrigerate or freeze until firm, about 30 minutes.
3. 3
   Preheat oven to 325 degrees. Bake crust until firm, about 30 minutes. Let cool completely on a wire rack. Reduce heat to 300 degrees.
4. 4
   Make the pistachio paste: In a food processor, combine pistachios, oil, and salt. Process until mixturecomes together. Add sugar and puree until very smooth and pastelike.
5. 5
   Make the filling: In a small saucepan, heat cream and milk. Pour over chocolate in a small bowl. Let stand 2 minutes. Slowly whisk until smooth. Let cool 10 minutes, then stir in egg until combined. Spread pistachio paste evenly in bottom of crust, pressing firmly with an offset spatula until flat and smooth. Place tart shell on a rimmed baking sheet and pour in chocolate filling. Bake until just set, 30 to 35 minutes. Let cool completely on a wire rack. Sprinkle tart with finely chopped pistachios before serving. Tart can be stored in the refrigerator up to 1 day.