Instructions: Preheat the oven to 350°F. Line baking sheet with parchment paper. • Melt the butter and white chocolate using a double boiler method. First, Bring a pot of water to a simmer. Then place a heatproof bowl on top of the water pot. Add the butter and white chocolate to the bowl. Stir the butter-chocolate mixture until melted and silky smooth. • In a separate bowl, whisk together egg and sugar using a handheld mixer. Mix until smooth. • Slowly pour the melted butter-chocolate mixture into the egg mixture. Mix until well combined. • Sift flour, baking powder, matcha powder, and salt into the wet ingredients. Hand-whisk just until well combined. Use a spatula to scrap the bottom of the bowl to make sure everything is evenly incorporated. Transfer the batter into a piping