To make a birthday cake cookie,
you can use specific cutters for a birthday/wedding cake.....

or you can use the CookieCrazie Homespun Tree cutter and trim it a bit for a cake cookie.

Using your choice of colors,  add lots of details for each layer of "cake".
There are so many ways to customize it for the birthday recipient....
colors, design, candles, name, etc
Have fun creating fun birthday cookies!

Special Occasion Calendar Cookie (Tutorial)
Birthday Cookies.....Orange, Green, & Pink.....With Pandas!
Birthday Cake Cookies