Almond Marzipan Cookie

INGREDIENTS

• 1 pound butter
• 4 cups all-purpose flour
• 1/4 cup ice-cold water, or more as needed
• 1 pound almond paste
• 2 cups white sugar
• 2 eggs
• 1 teaspoon almond extract
• 1 egg white, beaten
• 1 teaspoon water, or as needed