It's Spring and the perfect time to share this "Having a Ball" Mason Jar Birthday Cake with Flowers. With the jar carved from a sheet cake and cupcakes for the flowers, it's a very easy, impressive and fun cake! Keep reading for a picture tutorial and details!
Originally published in May 2019, updated July 2022
This cake would be perfect for any spring or summer celebration... a birthday cake (use the year of birth on the jar as I did) or even for a bbq or picnic cake. This was made for my favorite person at our local nursing home and she loved it!
Tools & Equipment to Make a Mason Jar Cake
Rectangle cake pan: I recommend this alphabet pan or a 9x13 cake pan. If you need more servings for a larger number of guests, you could easily do different sizes. Maybe upgrade to a 10x15 or 12x18 cake. You can see my favorite sheet cake pans here.
Small Spatula: I have about a dozen of these small spatulas for covering cakes with frosting.
Piping Tips for the flowers: I don't have pictures of piping the cupcakes, but you can see me piping rose cupcakes in this post. After decorating them with an Ateco #825 tip and some with a #104 petal tip. You can do all piped rosettes or mix them up with whatever designs you like for different buttercream flowers.
Cake & Frosting Recipes
You can substitute pretty much any cake recipe flavor and frosting recipe that you love, but here are the ones I use and recommend. Both are doctored cake mix recipes and if you click through the links, you'll find all the ingredients needed. You could also follow the box instructions for a cake like this.
For reference, I used a double batch of the vanilla cake batter to make the cake and cupcakes. This made enough dessert for around 30-35 guests.
Having a Ball Mason Jar Birthday Cake with Flowers Tutorial
First, you're going to need a sheet cake for the jar. I used this alphabet pan to bake my cake, but you could use any size/shape sheet cake that will work for you. I'd think a 9x13 cake pan would be a pretty common size that most cake decorators will have and will work great.
Because the alphabet pan comes with the squares used to make different letters, I used a couple of them to make the rough jar shape. Again, if you don't have this pan, you can easily just carve out the jar shape from a rectangle.
Using the alphabet pan gave me a slightly skinnier/taller "jar", but personally I don't think it would be a big deal for your jar to be wider and shorter as long as you have a recognizable shape.
Even with the pan I used, I still had to do some carving:
I cut off the sharp corners and all of the top edges to get a more rounded finish. My favorite knife for carving cake is this watermelon knife. After the cake was trimmed, I popped it into the freezer for 20-30 minutes to firm it up before frosting.
Buttercream Flower Cupcakes
I don't have pictures of piping the cupcakes, but you can see me piping rose cupcakes in this post. After decorating them with an Ateco #825 tip and some with a #104 petal tip, I used a dot of buttercream on the bottom of each cupcake to attach them to the board above the jar.
My client only need about 30 servings of cake (cake and cupcakes included), so I added a dozen cupcake flowers. If you need more servings, make a larger bouquet with more cupcakes! Here's a really large cupcake bouquet I made without the Mason jar:
And that was that... an easy, impressive "Having a Ball" Mason Jar Cake with Flowers!
If you have any questions about this cake, please leave me a comment and I'll answer if I can!
Check out these related posts:
No blog post for this one yet... but a long-time favorite bouquet of cupcakesL: