For a fall twist on the classic Funfetti cake, use a food processor to combine flour, sugar, baking powder, cinnamon, nutmeg, ginger, and salt. Add in pumpkin puree, eggs, vanilla extract, and milk, and pulse until the batter is smooth. Fold in rainbow sprinkles, then bake in a preheated oven for 25-30 minutes. Let cool before frosting with a cream cheese frosting made with cream cheese, butter, and powdered sugar.