Shiroi Koibito White Chocolate (Print Version)

# Ingredients:

→ Cookie Dough

01 - 56 grams unsalted butter, softened
02 - 40 grams powdered icing sugar
03 - 2 tablespoons egg white
04 - 0.5 teaspoon vanilla extract
05 - 0.5 teaspoon salt
06 - 45 grams all-purpose flour
07 - 16 grams cornstarch

→ Filling

08 - 90 grams white chocolate

# Instructions:

01 - Preheat oven to 175°C and line a baking tray with baking paper.
02 - In a mixing bowl, beat the softened butter and icing sugar until the mixture becomes light and creamy.
03 - Add egg white and vanilla extract, then continue beating until the mixture is smooth.
04 - Gradually sift in flour, cornstarch, and salt. Mix gently until just combined, forming a thick dough.
05 - Transfer the dough into a piping bag with the tip cut off. Pipe the dough into square, thin shapes onto the prepared tray.
06 - Use a scraper or offset spatula to level the surface of each square for even thickness.
07 - Bake for 13-15 minutes, or until the edges are lightly golden brown. Monitor closely to prevent overbaking.
08 - Transfer cookies to a wire rack and allow them to cool completely.
09 - Melt the white chocolate gently over a water bath or in the microwave at low power, stirring until smooth.
10 - Spread or pipe a thin layer of melted white chocolate onto the base of one cooled cookie, then sandwich with another cookie. Repeat with remaining pieces. Let set until the chocolate is firm.

# Notes:

01 - Ensure cookies are completely cooled before adding the chocolate filling to maintain crisp texture.
02 - For extra finesse, use a silicone mat with square templates for consistent sizing.