01 -
Melt the white chocolate chips with heavy cream in a heatproof bowl over a double boiler or microwave in 20-second intervals, stirring until smooth. Incorporate the pistachio paste and a pinch of salt until the mixture is smooth and fully combined. Spoon into a silicone mold or ice cube tray to form six equal discs, then freeze for at least 1 hour until solid.
02 -
Preheat the oven to 425°F (220°C). Grease six 6-ounce ramekins with butter and dust with cocoa powder. Arrange ramekins on a baking tray for stability.
03 -
Gently melt the unsalted butter and dark chocolate together in a small saucepan or microwave, stirring frequently until smooth. In a separate bowl, whisk the eggs, egg yolks, granulated sugar, and salt until thick and pale, approximately 2 to 3 minutes. Gradually add the melted chocolate mixture to the egg mixture, whisking until fully combined. Fold in the all-purpose flour carefully until just incorporated, avoiding overmixing.
04 -
Divide two tablespoons of chocolate batter into the bottom of each prepared ramekin. Place one frozen pistachio disc in the center, then cover with additional batter until three-quarters full.
05 -
Bake the ramekins for 11 to 13 minutes until edges are firm but centers remain slightly jiggly. Remove from oven and rest for 1 minute. Loosen edges with a knife if needed, invert onto serving plates, garnish with chopped pistachios if desired, and serve immediately.