01 -
Whisk eggs, sugar, and cornstarch in a bowl. Heat milk until simmering, add sifted matcha. Pour hot milk into egg mixture while whisking. Return to pot, cook on medium heat while stirring until thick. Add butter, strain, cover with plastic wrap and chill.
02 -
Cream butter and sugar until smooth, mix in flour. Roll between plastic wrap to ⅛" thick, freeze until solid.
03 -
Heat butter, water, and milk until simmering. Add flour all at once, stir 4 minutes to dry out. Cool slightly, beat in eggs gradually until proper consistency is reached.
04 -
Pipe 2" choux mounds, top with frozen craquelin discs. Bake at 400°F for 5 minutes, then 350°F for 25-30 minutes until golden. Poke holes to release steam, cool completely.
05 -
Whip cream until almost stiff peaks. Fold in half the matcha pastry cream for diplomat cream. Fill piping bags with diplomat cream and remaining pastry cream.
06 -
Fill puffs with diplomat cream, pipe pastry cream in center. Decorate tops with remaining cream. Serve within 1-2 hours.