Danish Creamery : Matcha Opera Cake

Ingredients

• ½ cup all-purpose flour
• 1 Tablespoon matcha powder
• 1 cup almond flour
• ¾ cup granulated sugar, divided
• ¼ teaspoon kosher salt
• 1 teaspoon vanilla extract
• 3 large eggs, room temperature
• 3 egg whites, room temperature
• 2 Tablespoons Unsalted Danish Creamery Butter, melted
• ½ cup granulated sugar
• 4 green tea bags
• 2 teaspoons fresh squeezed lemon juice
• 8 ounces white chocolate, very finely chopped
• ½ cup heavy cream
• ¼ cup pasteurized egg whites (from a carton), room temperature
• 1¾ cups powdered sugar
• ¾ cup (12 Tablespoons) Unsalted Danish Creamery Butter, cubed, room temperature
• ¼ teaspoon fine salt
• 2 Tablespoons Unsalted Danish Creamery Butter
• 2 ounces unsweetened chocolate, chopped
• 1 cup powdered sugar, sifted
• 2 Tablespoons boiling water, plus more if needed to thin