Preheat oven to 375°F (190°C). Line a baking sheet with parchment paper.
Beat together all pistachio cream ingredients until smooth and fluffy.
Slice croissants in half horizontally. Spread a layer of pistachio cream on the bottom half, followed by raspberry preserves or fresh raspberries. Close the croissants.
Brush tops with milk, then spread a thin layer of pistachio cream on top.
Sprinkle with crushed pistachios and bake for 10–12 minutes until golden and warm.
Dust with powdered sugar and serve warm.
Notes
Perfect for brunch or a sweet weekend treat. You can use almond meal if pistachios aren’t available.