Preheat the oven to 350 degrees.

Add the cake mix, oil, water, and eggs to a mixing bowl, and beat for 2 minutes on medium speed.

Add the cupcake liners to a cupcake pan, and fill each liner 1/2 full with the batter. Tap the pan down on the counter to even out the added batter.

Put the pan in the oven for 12-15 minutes. Insert a toothpick into the middle of the cupcakes to check if they are fully baked. If the inserted toothpick comes out clean, they are done.

Remove them from the oven and add to a cooling rack for 1 hour.

Once the cupcakes are totally cooled, take them out of the pan and use a star frosting tip to carve a whole in the middle of the cupcake. Only carve it out about halfway.

Fill the space with sprinkles.

Clean off the piping tip, then put it into the piping bag, full of frosting.

To frost the cupcakes, start at one edge, and go around the cupcake clockwise. Go into the middle of the cupcake once you meet the original starting point. You can do two loops if you want to add more frosting before piping towards the center.

Add sprinkles to the top - and enjoy!