Birthday Cake Cookie – 2¼ cups (270 g) all purpose flour – 1½ tsp baking powder – ½ tsp salt – ¾ cup (170 g) unsalted butter, softened – ½ cup (100 g) granulated sugar – ½ cup (60 g) powdered sugar – 2 large eggs (US), room temperature – 2 tsp (10 ml) vanilla extract – ¼ tsp almond extract optional – 3 tbsp rainbow sprinkle Vanilla Frosting – 6 tbsp (85 g) unsalted butter room, temperature – 2 cups (240 g) powdered sugar – 1 tsp (5 ml) vanilla extract – ¼ teaspoon salt – 2 tbsp (30 ml) heavy cream – ¼ cup (59 ml) rainbow sprinkle