Preheat the oven to 350 degrees. Spray loaf pans with baking spray and set aside.

In a large bowl whisk together the eggs, vegetable oil, milk, vanilla, and pumpkin pie spice.

Add in the cake mix and pudding mix and mix for 2-3 minutes or until smooth.

Pour the batter into the prepared pans. Bake for 40-45 minutes for 8 x 4 loaf pans, 30-35 minutes for medium sized loaf pans, or 20-25 minutes for mini loaf pans.

Remove from oven and cool completely in the loaf pans.

To make the frosting place the butter in a large bowl and use a hand mixer to beat at medium high speed until smooth.

Add in the powdered sugar, milk, and vanilla and beat until desired consistency is reached.

Place frosting in a piping bag with a tip and pipe on top of the cakes. Add sprinkles if desired.