6 croissants from part 1 (see Notes)
Pistachio Paste (makes extra)
- 1/2 cup unsalted shelled pistachios
Pistachio Crème Patisserie
- 1 egg
- 1/4 cup sugar
- 2 tbsp cornstarch
- 1 cup milk
- 1/4 tsp salt
- 1/2 tsp vanilla
- 1 tbsp unsalted butter
- 2 tbsp pistachio paste
Icing
- 1 cup powdered sugar
- 3-4 tbsp milk + more if needed
- A few drops of green food color