– 2 cups all-purpose flour – 3/4 cup sugar – 1/3 cup unsweetened cocoa powder – 1 tsp cinnamon – 1/2 tsp cloves – 1/4 tsp nutmeg – 1 1/2 tsp baking powder – pinch of salt – 1/4 cup plus 3 tbsp unsalted butter – 1/2 cup walnuts, finely chopped – zest of 1 orange – 1 large egg – 1/2 cup milk For the glaze – 1/2 cup powdered sugar – 3 tsp milk