Brown Butter Rice Krispie Treat Cake – brown butter cake layers, brown butter frosting, marshmallow fluff and Rice Krispie Treats.
End of the Year Planning
Believe it or not, I’ve planned my entire cake calendar for the rest of the year! I’ve been patting myself on the back all week because I’m so happy about it. I feel like summer always puts me in a bit of a tizzy. I do my best to plan my work schedule around activities with the kids, but it never goes quite as I plan.
Anyway, as school kicked off last week, I felt like it was the perfect time to get myself back into a routine and structure just like I’m doing with the kids. I now have two full-time students! It’s like there’s all of a sudden more hours in my day. Haha! Ok, not really. But I fully intend to make the best use of my time while Westin and Avery are at school each day. And to make sure I do that, having a calendar of events, classes and even which cakes I’m going to bake helps me feel a little more on top of things. (I love lists! I love to check things off my list even more!)
As I was in the midst of planning out my cakes the other day, my mom called to catch up. Naturally, we started to talk about my list of cake flavors. As we chatted, we started to brainstorm more ideas. She quickly suggested I do a Rice Krispie Treat cake.
I have loved the idea of a Rice Krispie Treat cake for a while now, but I haven’t done one because I couldn’t quite nail down a unique spin. I didn’t just want layers of Rice Krispie Treats stacked on top of one another or layers of the cereal treats between my cake layers. Plus, I wanted to make sure I paired this classic treat with just the right flavors.
My mom quickly threw in the idea of using brown butter as an element with the Rice Krispie Treats. As soon as she said brown butter, my blood starting pumping faster and faster, and I knew exactly what I wanted to do!
It came to me in seconds: brown butter cake, brown butter frosting, homemade marshmallow fluff from my Ultimate S’mores Cake, and Rice Krispie Treats crumbled between the layers. I was instantly so excited about this cake that I added it to my cake calendar and got to work the next day!
Brown Butter Rice Krispie Treat Cake
First thing the next morning, I browned my butter. This is a great step to do ahead of time. As you’ll see in the recipe instructions, you basically just cook the butter (without stirring) until it starts to foam and there’s a smell of cooked butter filling the air. You can add the butter as a liquid to the cake batter, but you definitely want to let the butter for the frosting firm up again. Remember, we like cold butter for our buttercream! So plan to do this step the day before you make your cake and frosting.
Brown Butter Cake
For the cake, you’ll use one cup brown butter just like you would with regular butter. I’m using my vanilla cake as a base for this cake, but you won’t use vanilla bean paste. Instead, we want the brown butter flavor to stand out, so we’re only using a teaspoon of vanilla extract.
As you bake the cake layers, remember to check the centers of the cake with a toothpick. The cake is done when a toothpick inserted into the center of the cake comes out with a few moist crumbs on it.
Brown Butter Frosting
For the frosting, you’ll be using two cups of butter, but we’re only browning one cup. I felt like a full two cups of brown butter would be a bit overwhelming. One cup is perfect. You get an awesome flavor that compliments the cake and fillings beautifully.
The filling is the marshmallow fluff we add to the top of my Ultimate S’mores Cake. It’s so yummy and quite simple to make. This one requires egg whites, sugar, corn syrup and a few other basic ingredients.
One note about this filling – it’s a soft filling. This means you’ll need to pipe a rim of frosting around the edge of the cake layers as you stack. It also means that it won’t hold it’s shape on it’s own if you’re using it to pipe on the top of the cake. This is why I used my kitchen torch to brown the marshmallow fluff. I have THIS torch.
Rice Krispie Treats
The Rice Krispie Treats are done exactly how you’d expect and just like you’ll find on the side of the cereal box. These can be made ahead of time and stored in an airtight container.
I do suggest, however, that you let them sit out for a while without a cover. We want the Rice Krispie Treats to get hard and crunchy so we have an awesome texture when we bite into the cake.
Also, and this is very important, do not assemble this cake too far in advance. In fact, I wouldn’t assemble this cake until a couple hours before you want to serve it. If you assemble the cake too far in advance, the Rice Krispie Treats will lose their crunch.
However, if you need to make this one ahead of time, you can make the cake without adding the Rice Krispie Treats. Then, freeze and store the cake just like you would with my other cakes. When it’s time to serve the cake, crumble Rice Krispie Treats on each slice of cake.
- Make the brown butter ahead of time.
- Your cake is done when a toothpick inserted into the center of the cake comes out with a few moist crumbs on it.
- Use cold butter for your frosting.
- Torch the marshmallow fluff if you add it to the top of your cake.
- Do not assemble this cake until the day you want to serve it. The Rice Krispie Treats will lose their crunch if you assemble too far in advance.