01 -
Preheat oven to 200°C. Line a baking sheet with parchment paper. In a medium saucepan, combine butter, water, milk, salt, and sugar. Bring to a boil over medium heat, stirring occasionally. Remove from heat, add flour all at once, and stir vigorously with a wooden spoon until dough forms a ball. Return to low heat and stir for 2 minutes to dry the dough slightly.
02 -
Transfer dough to a mixing bowl and let cool for 2 minutes. Beat in eggs one at a time, mixing thoroughly after each addition. Gradually add butter-yellow gel food coloring until a pale yellow shade is achieved.
03 -
Transfer dough to a piping bag fitted with a large round tip. Pipe 7 even mounds (about 5 cm in diameter) onto prepared sheet, spacing them apart. Smooth any peaks with a damp finger. Bake for 25–28 minutes until puffed and golden; do not open the oven early. Turn off the oven, crack the door, and let cream puffs rest for 10 minutes. Cool completely on a rack.
04 -
Heat milk in a saucepan until steaming but not boiling. In a separate bowl, whisk together egg yolks, sugar, and cornstarch until pale. Gradually whisk in the hot milk. Return mixture to saucepan and cook over medium heat, whisking constantly, until thickened and bubbling (about 2–3 minutes). Remove from heat and whisk in butter, vanilla, and salt.
05 -
Divide pastry cream evenly between two bowls. In one bowl, whisk in sifted matcha powder. In the other, whisk in pistachio paste. If desired, gently fold half of the whipped cream into each for a lighter texture. Cover and refrigerate both creams for at least 1 hour.
06 -
Slice cooled choux puffs in half horizontally. Using two piping bags fitted with small round tips, pipe alternating stripes or swirls of matcha and pistachio creams into each puff to create a marbled effect. Replace the tops.
07 -
Dust puff tops generously with powdered sugar and sprinkle with chopped pistachios to garnish. Serve promptly for optimal texture.