My daughter was having a princess party for her third birthday so I purchased a castle kit from Michaels craft store. I also purchased bright pink and light pink crystallized sugar, meringue powder for the frosting that was used to make the flowers (the powder includes recipes for frosting), wooden dowel sticks and candy melts to connect to the towers (then inserting them into the cake), the silver cardboard cake plates, and 6&10 inch cake pans from Michaels.
Other items you would need to make a cake like this would be frosting bags, different frosting tips, and gel food coloring.
For this homemade Princess castle cake I used two boxes of Betty Crocker golden vanilla. I also purchased a pound of whipped frosting from the bakery section of my local grocery store. The combination of the two makes a delicious cake! Buying the frosting makes it a lot easier! This kind is also not sickeningly sweet!
The cake kit includes instructions on how to prepare the cake, making different frosting, how to store everything, putting the cake together, the different cakes you could make with the kit, and the different tips that you would need for those specific ones. The kit is nice because if you have a boy too you could always do the medieval cake or the candy castle. I enjoyed making the cake but it was hard work!
For my first cake I thought I did a pretty good job:) My daughter loved it and everyone said it tasted better than the ones you could buy at the store (which costs a fortune)!
Related cakes:
12+ Original Homemade Princess Castle Cake Ideas 
12+ Coolest Castle Cake Ideas – Awesome Homemade Castle Cake Designs! 
12+ Coolest Disney Princess Cake Ideas – Awesome DIY Cake Decorating! 
12+ Pretty Homemade Princess Cakes 
12+ Inspiring Homemade Princess Birthday Cake Ideas 
10+ Coolest Princess Cake Ideas 
Coolest Pink Princess Castle Cake 
1st Birthday Princess Castle Cake
I love this princess cake it is so pretty!