If you don't already have all of these items in your pantry, here is an approximate cost:
box of cake mix APX $2.50
& oil $4.00
1-(12) muffin pans (reusable) $6.00
& baking cups $1.00
chocolate frosting $2.00
squeeze frosting (in a tube) $3.00
tips for the tube (reusable) $2.00
total APX $22.00
Follow cake mix box instructions. Pour into muffin pans and bake. Cool cupcakes, frost & decorate. Arrange on plate and serve.
Yields 20-24 cupcakes
Here's a hint you'll need 13 cupcakes to spell out Happy Birthday.
The end result....OK so it isn't the prettiest picture, but you get the idea & it was umm, umm goooooood!