Gougères

Instructions

1. 1
   Assemble the green core: whisk the chilled pastry cream base with the pure pistachio paste and matcha powder until it yields a smooth, intensely glossy pastel-green cream. Transfer to a piping bag with a narrow nozzle and chill.
2. 2
   Preheat your oven to 200°C (400°F) conventional mode and line a baking sheet with silicone or parchment paper.
3. 3
   Build the choux dough: combine water, milk, cubed butter, salt, and sugar in a heavy saucepan over medium heat. Allow the butter to liquefy and let the mixture hit a rolling boil.
4. 4
   The second it boils, pull the pan off the heat and dump in the sifted flour all at once. Beat aggressively with a wooden spoon until a cohesive paste forms.
5. 5
   Return the pan to low heat for 1-2 minutes to dry out the paste (panade). It is ready when it pulls away completely from the pan sides, leaving a thin white film on the bottom.
6. 6
   Transfer the hot paste to a large bowl and let cool for about 5 minutes until warm to the touch.
7. 7
   Incorporate the eggs one by one: beat the first egg completely into the paste until absorbed before adding the next. The final dough should look glossy, silky, and form a clean 'V' ribbon shape when lifted from the spoon.
8. 8
   Load the dough into a piping bag with a wide round tip and pipe small 4cm mounds onto the sheet, spacing them well apart.
9. 9
   Bake at 200°C for 15 minutes; then lower to 180°C (350°F) without opening the oven door under any circumstance, and cook for 10 more minutes until puffed and rigid.
10. 10
    Turn off the oven, prop the door open just a crack with a wooden spoon, and let the shells dry inside for 5 minutes to prevent deflation.
11. 11
    Once cooled to room temperature, puncture a tiny hole in the base of each puff and pipe the green cream inside until they feel heavy and filled.
12. 12
    In a tiny pan, melt the 50 grams of sugar with a few drops of water over medium heat until it caramelizes into a clear amber liquid.
13. 13
    Assemble the presentation layout inspired by `gougeres.png`: place one filled puff at the base, drizzle with caramel lines, and stack another puff on top (carefully opening the top of the upper puff to showcase the stunning green cream). Serve cool.