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Shiroi Koibito

Sweet Shiroi Koibito: Homemade Japanese Cookie Bliss

Indulge in homemade Shiroi Koibito, delightful Japanese sandwich cookies with white chocolate ganache, perfect for any occasion.
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Prep Time 30 minutes
Cook Time 12 minutes
Cooling Time 15 minutes
Total Time 57 minutes
Servings: 12 cookies
Course: Desserts
Cuisine: Japanese
Calories: 200
Ingredients Equipment Method Nutrition Notes

Ingredients
  

For the Cookies
  • 125 g Unsalted Butter Provides richness and structure; consider vegan butter for dairy-free option.
  • 80 g Powdered Sugar Adds sweetness and smooth texture; sift for lump-free batter.
  • 1 large Egg White Acts as a binding agent; using room temperature helps for better incorporation.
  • 60 g All-Purpose Flour Forms the cookie’s bulk; sift to maintain a light texture.
  • 15 g Cornstarch Helps achieve a tender bite; can be replaced with additional flour if necessary.
  • 0.25 tsp Vanilla Extract Optional; enhances flavor with aromatic notes.
  • 1 pinch Salt Balances flavors; optional but recommended.
For the Ganache
  • 200 g High-Quality White Chocolate Provides a rich, creamy filling; choose brands that use cocoa butter.
  • 50 ml Heavy Cream Creates smooth ganache; heat until just simmering.
  • 15 g Unsalted Butter for Ganache Adds richness to the filling.

Equipment

  • mixing bowl
  • electric mixer
  • piping bag
  • Saucepan
  • Baking Sheet
  • Wire rack

Method
 

Step-by-Step Instructions
  1. Cream together the softened butter and powdered sugar until light and fluffy, about 3-5 minutes.
  2. Add the room temperature egg white and mix on low speed until fully combined.
  3. Incorporate the vanilla extract if desired and mix briefly.
  4. In a separate bowl, whisk together the flour, cornstarch, and salt. Gradually mix this into the wet ingredients.
  5. Transfer the cookie batter into a piping bag fitted with a small round tip.
  6. Pipe oval shapes of batter onto a parchment-lined baking sheet, spacing them an inch apart.
  7. Preheat oven to 325°F (160°C). Bake piped cookies for 8-12 minutes until lightly golden.
  8. Allow cookies to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.
  9. Finely chop the white chocolate and place it in a heatproof bowl.
  10. Heat the heavy cream in a saucepan over medium heat until it simmers.
  11. Pour the hot cream over the chopped chocolate and let sit for 1 minute, then stir until smooth.
  12. Add the unsalted butter to the ganache and mix until fully incorporated.
  13. Let the ganache cool at room temperature for about 10-15 minutes.
  14. Take one cooled cookie, spread ganache on one side, and top with another cookie to form a sandwich.
  15. (Optional) Chill the assembled cookies in the refrigerator for 30 minutes.
  16. Serve cookies at room temperature or chilled.

Nutrition

Serving: 1cookieCalories: 200kcalCarbohydrates: 26gProtein: 1gFat: 10gSaturated Fat: 6gPolyunsaturated Fat: 0.5gMonounsaturated Fat: 3gCholesterol: 15mgSodium: 60mgPotassium: 20mgSugar: 10gVitamin A: 300IUCalcium: 20mgIron: 0.5mg

Notes

These cookies can be customized with different flavors of ganache for a unique twist.

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