Ingredients
- Unsalted butter: 70g (softened)
- Powdered sugar: 60g
- Egg whites: 70g (from about 2 large eggs)
- All-purpose flour: 70g (sifted)
- alcohol-free vanilla extract: 1/2 teaspoon
- Good quality white chocolate: 100g (chopped)
- Heavy cream: 30g
Instructions
- Step 1: Preheat oven to 160°C (325°F). In a medium bowl, cream the softened unsalted butter and powdered sugar together until the mixture is light and fluffy. Gradually add the egg whites, mixing well after each addition until fully incorporated and the batter is smooth. Stir in the vanilla bean paste.
- Step 2: Gently fold in the sifted all-purpose flour into the wet mixture until just combined, being careful not to overmix. Transfer the smooth batter to a piping bag fitted with a plain round tip (or use a Ziploc bag with a corner snipped off).
- Step 3: Line a baking sheet with parchment paper. Pipe thin oval shapes, approximately 5-6 cm long, onto the prepared baking sheet, leaving some space between each cookie. Bake for 10-12 minutes, or until the edges are golden brown and the centers are lightly golden.
- Step 4: Carefully remove the cookies from the oven and let them cool on the baking sheet for a few minutes before transferring them to a wire rack to cool completely. They will crisp up as they cool.
- Step 5: For the filling, gently melt the chopped white chocolate using a double boiler or in short bursts in the microwave, stirring until smooth. Once melted, stir in the heavy cream until a smooth ganache forms. Let the ganache cool slightly at room temperature until it thickens to a spreadable consistency.
- Step 6: Take one cooled cookie and spread a small amount (about 1-2 teaspoons) of the white chocolate ganache onto its flat side. Top with another cookie, gently pressing to form a sandwich. Repeat with the remaining cookies and chill in the refrigerator for at least 30 minutes to allow the filling to set before serving.
Notes
- Keep your finished Shiroi Koibito in an airtight container in the refrigerator for up to 5-7 days; this preserves the ganache's ideal set and helps the cookies maintain their delicate crispness.
- These delicate Japanese snacks are best enjoyed chilled straight from the refrigerator, or allow them to sit at room temperature for about 10-15 minutes for a slightly softer, melt-in-your-mouth ganache experience.
- Elevate your snack time by pairing these elegant cookies with a warm, gentle cup of matcha green tea or a light floral infusion to truly complement their subtle sweetness and creamy filling.
- The recipe calls for good quality white chocolate for a reason – investing in a premium brand ensures your ganache will be perfectly smooth, rich, and deliver that signature luxurious flavor profile of an authentic Shiroi Koibito.
- Prep Time: 15 minutes
- Cook Time: 20 minutes
- Method: Stovetop
- Cuisine: American
Nutrition
- Serving Size: 1 cookie (approx. 12g)
- Calories: 75
- Sodium: 25mg
- Fat: 4.5g
- Saturated Fat: 2.8g
- Trans Fat: 0.1g
- Protein: 7g