Polvorones Recipe | King Arthur Baking

Ingredients

• 16 tablespoons (226g) unsalted butter, room temperature
• 1/2 teaspoon table salt
• 2 cups (227g) confectioners' sugar, sifted if lumpy
• 1 large egg
• 3 1/2 cups (420g) King Arthur Unbleached All-Purpose Flour or King Arthur Gluten-Free Measure for Measure Flour
• 1 tablespoon baking powder
• zest of 1 orange
• 1/2 teaspoon orange blossom water
• 1 teaspoon hibiscus tea, finely ground
• 1/8 to 1/4 teaspoon liquid red or pink food coloring
• 1 tablespoon (5g) black cocoa*
• 1 1/2 teaspoons King Arthur Pure Vanilla Extract
• 1/8 teaspoon espresso powder, optional
• 1 large egg white, beaten