How to Fill and Stack Cake Layers

how to fill cake layers tutorial

Have you ever had a fiasco with your cake filling? I have. Between it bulging out between layers or straight up oozing out of the sides because it’s just too thin to withstand the weight of gravity, I’ve seen it all. The thing is, the filling and stacking process is arguably the most essential part of building your cake’s foundation. If your cake filling is unstable in any way it can throw off the entire outcome of your cake, and if you’re anything like me (perfectionistic to a fault), that can be totally devastating. 

how to fill and stack cake layers

Over the years, I’ve come to depend on two different approaches to filling and stacking cakes, since in my opinion, there are two different types of cake fillings. There are stable fillings like buttercream and then there are less-stable fillings like soft consistency chocolate ganache, salted caramel, jam, lemon curd, etc. Whatever you’re using to fill your cakes these days, I’m about to show you my way of filling and stacking layer cakes. Here’s a quick video to show you the methods I’ve come to love before you read all the details below:

Before we move on to details, if you’re wanting to see more Cake Basics videos like this one, you should definitely check out my YouTube Channel and watch more of this series! You’ll even find cake recipes and decorating tutorials there to help broaden your skill set and inspire you. Be sure to hit the Subscribe button so you never miss a new video!  

Before You Start Filling & Stacking

No matter what kind of filling I’m using, I always start by placing a cardboard cake circle that’s the same diameter as my cake layers onto the turntable. Then, place a small dab of buttercream onto the cake circle before adding the first cake layer on top. The little swipe of buttercream acts as “glue” to keep the bottom layer in place.

how to stack cake layers
how to build a layer cake tutorial

Using this cardboard cake circle method not only keeps your bottom layer in place, it makes your cake easier to work with overall and easier to transport from the turntable to a cake stand or box once it’s finished. 

After you’ve got your bottom layer secured to the cake circle, follow either of the methods below depending on the type of filling you’re using. 

Filling Cakes with Buttercream 

Filling a cake with buttercream is super straightforward as long as you’re working with the right consistency of buttercream. My vanilla buttercream recipe is the perfect consistency for filling and frosting cakes as-is, but if you find that your buttercream collapses underneath the weight of the above cake layer and starts oozing out of the sides, it will need to be made thicker. That could mean adding extra powdered sugar to your buttercream or cooling it in the refrigerator before whipping it back up, depending on the type of buttercream you’re using.

how to fill cake with buttercream

To fill a cake with buttercream, simply add a few spatula scoops full onto your cake layer and smooth it down with an angled spatula until it’s about ½ inch thick (or however thick you prefer your filling to be). 

how to fill cake with buttercream
how to add buttercream filling to cake

It’s super important to make sure your buttercream filling is as level as possible, so be sure to get down to eye level and check to see that it’s nice and even before adding your next cake layer. 

buttercream cake filling tutorial

Filling Cakes with Soft Fillings (Ganache, Caramel, Jam, etc)

If you’re using a softer filling, like chocolate ganache, lemon curd, salted caramel, or really anything that could easily ooze out under the weight of a cake layer, I recommend creating a buttercream dam around the edge of your cake layer before adding your filling to the center.

chocolate ganache filling recipe

To create the dam, you’ll want to use a medium or stiff consistency buttercream (these notes after my vanilla buttercream recipe detail how to create those consistencies). Add the buttercream into a piping bag and snip off about ½ inch opening, then pipe a dam around the cake layer that’s about ¼ inch from the edge of the cake. 

piping a buttercream dam on cake
how to make buttercream dam for filling

Fill in the center of the dam with your filling. This method basically gives your filling a nice bumper to hold up the weight of the cake layer, keeping your softer filling nice and secure inside. 

how to fill cake with chocolate ganache
how to use chocolate ganache filling cake

Smooth down your filling until it’s level with the top of the dam, then place your next cake layer on top. 

Stacking Cake Layers

After placing your cardboard cake circle down and filling the bottom layer of your cake using either of the above methods, place your next layer of cake right side up on top. Be sure to get down to eye level to make sure it’s centered with the bottom layer. 

stacking a layer cake tutorial

Then, repeat the process of adding and smoothing the filling before placing the next layer on top. 

how to stack a layer cake

When adding your top layer, flip it upside down (so that the bottom of the cake layer is the top).

how to fill and stack layer cakes

By adding it cut-side down, it greatly reduces the amount of loose crumbs that end up in your crumb coat and final cake finish. 

Creating Structure for Tall Cakes

My go-to cake height is 3 layers, typically 6-inches in diameter. Between the filling and frosting, my cakes end up being between 5 and 6 inches tall. The higher you fill and stack your cakes, the less sturdy they will become due to the weight of the above layers and the nature of gravity. If you want to make an extra tall cake, you’ll want to use the barrel method to add extra structure. This involves adding supports via dowels/boba straws and extra cardboard cake circles to even out the weight of the cake. While I don’t yet have my own tutorial on this method, this is the method I’ve used with success and point readers to all the time. 

Want more Cake Basics? Head here to see all of the posts and learn the methods of caking I’ve come to love over the years. I’m cheering you on every step of the way!


  1. Ghada abdelghani Gaber

    It’s amazing to see how can I do this I like it but I want to now to decorate the cake it’s the better to use butter cream or unther cream thx

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