Orange Drop Shortbread Cookies

Ingredients

• powdered sugar to garnish
• 1/2 pound unsalted butter, room temperature
• 1/2 cup powdered sugar
• 2 cups flour
• 1 teaspoon vanilla extract
• 1 egg, beaten
• 3/4 cup sugar
• 1 1/2 tablespoons unsalted butter, cut into small pieces
• 2 tablespoons fresh orange juice
• 1 tablespoon fresh lemon juice
• zest of 1/2 an orange