Pumpkin Spice Sugar Cookies

Sugar Cookie Dough

• 115 g sugar
• 115 g brown sugar
• 225 g butter, unsalted chilled, diced (½ in.)
• 1 egg, large (65-70 g)
• 1 tsp vanilla extract, natural
• 70 g pumpkin pie filling, canned
• 340 g all purpose white flour
• 2 tbsp pumpkin pie spice
  或 2 tbsp pumpkin spice mix, homemade
• ½ tsp salt
• all purpose white flour to dust

Royal Icing

• 14 ounce sugar divided
• 3 tbsp pumpkin pie filling, canned
• 1 tbsp water
• food colouring (any kind) (e.g., orange, black)
• sugar sprinkles, coloured