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This recipe for Lemon Buttercream Cake with Lemon Curd Filling is perfect when you want a cake full of flavor and a bite of creamy lemon curd.

One of my favorite spring flavors is Lemon. I love making delicious lemon recipes like my Pioneer Woman Lemon Bars or this recipe for THE BEST Lemon Bars ever.

Of course, when Spring Sweets Week came around, I knew I wanted to make another lemon dessert –using my awesome homemade lemon curd. That is how this delicious Lemon Buttercream Cake with Lemon Curd Filling came about.

Lemon Buttercream Cake with Lemon Curd Filling

My son's favorite type of cake is Lemon and since he has been asking for one, I made it happen and this cake is AMAZING and so full of flavor. I used Adam's Extract flavoring in both lemon and vanilla to really punch up the flavors in this cake.

Now, if you have never seen a square cake like this before, let me show you how I made it using these amazing baking pans from Anolon. The 9×13 pan is perfect for making a two-tier square cake — perfect for slicing in half and filling with lemon curd.

What I love most about these pans is that you don't need to flour or coat or spray or add parchment paper to these non-stick pans. They are truly non- stick and your cakes will come out so beautiful when you flip it over!

Once the cake comes out of the pan and cools, cut the cake in half, and then cut each half in half. When you are finished you should have 4 layers.

Now the fun begins!

Layering Your Cake

One of the best parts about this cake is the fresh lemon flavor you get from the lemon zest that runs all throughout the cake, the curd, and the buttercream icing. I used this Deiss Lemon Zester which has super sharp teeth — and my favorite kitchen gadget by far.

So — now that you have all your layers ready, let's assemble.

Start by laying one layer of your cake down and adding 1/4 cup of lemon curd. Spread it out evenly to get it all the way to the edge.

Next, add another layer of cake. On top of that layer, you are going to add your buttercream. You can do this layer as thick or as thin as you want. I prefer thinner because I add a lot of icing on the final layer.

Now, add another layer of cake. On top of this layer, you are going to add another 1/4 cup of lemon curd. Top with the final layer of cake.

At this point, if you have edges that are not even, you can take your knife and go around the cake and shave off the uneven parts so your cake looks like a uniform square.

Now, just cover all of your cake with the remaining buttercream for a delicious and flavorful lemon buttercream cake.