Set your oven to 350°F and start to make the batter. Take the cake mix, eggs, water, and oil and mix it in a bowl together. You want the batter to come together, so, make sure that there are no pieces of flour that are unincorporated.

If you are making this in a traditional cake form, spray an 8 or 9 inch pan. If you want to make individual cakes as is shown in this recipe, take a jelly roll pan, spray the bottom with a non-stick spray and line with parchment paper. Pour the batter onto the parchment paper and use an offset spatula to spread it out evenly. It may seem thin in some areas, however, it will puff up as it bakes.

Place the tray in the oven for 23 minutes. Remove from the oven and allow it to cool completely. In the meantime, make your icing.

In the bowl of a standing mixer, or you can do this by hand or with a hand-mixer, take your room temperature butter, cream cheese, powdered sugar, and vanilla and mix together to form your icing. If you find the icing if a bit too stiff, add in some milk or heavy cream. 1 tablespoon at a time.

When the cake is cool, use biscuit or cookie cutters to cut out the circles. Ice them however you want, and voila! Funfetti cakes!