This marvelously moist, chocolate-fudge-frosting-topped, and one-bowl wonder of an Instant Pot Cake just made it official: my electric pressure cooker and I are in a serious relationship.
I remember opening the little recipe booklet that came with my Instant Pot, flipping to the dessert section, and thinking, Who would bake in an electric pressure cooker?
Flash forward one year and THIS GIRL RIGHT HERE. I’m an Instant Pot Cake convert. Not only is this cake ridiculously tender and fudgy, but it’s vegan, whole wheat, and naturally sweetened, including the frosting.
I had a ridiculously fun time putting this Instant Pot chocolate cake recipe together. If you own an Instant Pot (this is the model I have and recommend) and are ready to take your relationship from casually texting to appliance you’d bring home to mom (or maybe buy mom for her birthday?), this cake recipe is for you!
And if you don’t have an Instant Pot? Don’t worry, you can still bake this chocolate cake in your oven. I have everything you need in the recipe below.
How to Make the Best Instant Pot Cake
Before we dive into the recipe, let’s walk through some of my tips for making the most perfect, moist, and delicious Instant Pot Cake.
Step 1: Pick the Right Pan
Let’s get this out of the way right now: this cake does not bake in a standard 8-inch or 9-inch round cake pan. Both sizes are too large to fit in a standard 6-quart Instant Pot. You’ll need a 6-inch round cake pan like this one. Six-inch cake pans are available in many baking stores, online here, and you can use them for far more than Instant Pot recipes!
I actually love this smaller-size pan. It’s perfect for a dinner party when you’re hosting a smaller group or anytime you are craving cake but don’t want copious amounts of leftovers tempting you at odd hours.
You also do not need to seek out only recipes written for a smaller pans. Here’s how to use it with standard cake recipes:
How to Use a 6-Inch Cake Pan
- Make a Single Layer 6-Inch Cake from a Single Layer 9-Inch Cake Recipe. Halve any recipe written for a single layer 9-inch cake and bake it in a 6-inch pan. Be sure to check it several minutes early, as the smaller cake may bake more quickly.
- Make an Adorable Double Layer 6-Inch Cake from a Single Layer 9-Inch Cake Recipe. Keep the 9-inch single layer cake recipe the same. Divide the batter between two 6-inch pans. If you don’t want to purchase two 6-inch pans, you can bake the layers one at a time. Be sure to let the pan cool to room temperature in between.
- Make an Double Layer 6-Inch Cake from a Double Layer 9-Inch Cake Recipe. Halve the 9-inch cake recipe. Divide the batter between two 6-inch pans (or use the same pan twice, cooling it in between), unless you want to make a teetering-but-impressive 4-layer 6-inch cake, in which case, I want to see photos!
- For Recipes Written for Cake Sizes other than 9-Inches, I recommend using this conversion link to compare the pan volumes and using your best judgement.
Or just bake this Instant Pot Cake! The recipe is ready to go for a 6-inch pan as-is.
Baking an Instant Pot Cake without a Pan + Other Options
- I do not recommend making this Instant Pot Cake without a pan (meaning spreading the batter in the bottom of the Instant Pot), as the batter will burn.
- If you’d like to make an Instant Pot chocolate bundt cake, you can try using a 6-cup bundt pan that will fit inside the Instant Pot like this one. (I have this one and the handles were too wide to fit, so I haven’t tested a bundt version yet, but if you do, I’d love to hear how it goes!)
- I’ve also heard rumors of baking Instant Pot cakes inside of heatproof bowls but have not played around with this myself yet.
OK, now that I have (hopefully) convinced you to pick up the proper pan, let’s get to the batter, shall we?
Step 2: Make the Instant Pot Cake Batter
This part takes less than 15 minutes, and all you’ll need is two bowls and a spoon. The cake is whole wheat, naturally sweetened in part with maple syrup, and intensely chocolatey.
My tricks to amping up the chocolate are espresso powder (it won’t make the cake taste like coffee; rather, it makes the chocolate pop) and cocoa powder, which makes the Instant Pot cake rich and fudgy.
This Instant Pot cake is vegan, but if that isn’t a concern, you can feel free to swap the coconut oil for unsalted butter and use any kind of milk you like. For a gluten free Instant Pot cake, try swapping the whole wheat flour for a GF 1:1 baking blend like this one.
Step 3: Prepare the Pan
You are going to need to be able to lift the pan out of the Instant Pot once it bakes without burning your fingers. To do this, you can either use the trivet that came with the Instant Pot or, if you don’t have it anymore, make yourself a nifty foil sling to lift it out.
You’ll also need to tightly seal the top of the pan with foil to make sure that steam doesn’t get in and make your cake all mushy. Moist is good. Soupy, wet cake is not.
Here’s a step-by-step visual featuring the foil sling. One thing you can’t see in the photo: place a small, heatproof bowl upside down in the Instant Pot before adding the pan on top of it so that the pan is slightly elevated and does not touch the bottom of the pot directly.
And here’s what it looks like if you have the handled trivet (no upside down bowl needed). Both methods work beautifully.
Step 4: Pressure Cook the Cake
Although the Instant Pot has plenty of fancy features I considered to cook the cake (I won’t be surprised if upcoming models include an Instant Pot cake function), to keep the recipe as simple as possible and accommodate different brands of electric pressure cookers, I went the simple route and cooked it on high pressure (manual).
- Add 1/2 cup water to the Instant Pot. This will prevent the dreaded “Burn” warning.
- Lower the cake into the Instant Pot via either the foil sling or the trivet.
- Seal and cook on high pressure for 35 minutes, then vent immediately.
- Let the cake cool, then it’s time for…
Step 5: The Frosting
Even if you think you are not a frosting person, do not skip this one. It’s lusciously creamy, dreamy dark chocolatey, and not at all overly sweet or greasy. This frosting is so tasty, I was dipping it with pretzels and licking the spoon like a lollipop by the end.
This chocolate frosting is also healthy as far as frostings go. Instead of butter, I used avocado, cocoa powder, and maple syrup. It’s legitimately delicious and likely to be my go-to chocolate frosting for many a cake to come.
Step 6: Slice and Serve
- Add berries to the top of the cake for color and juicy sweetness.
- Warm up individual slices and serve with vanilla ice cream, whipped cream, or coconut cream (how my friends and I devoured most of it).
- Eat the cake directly from the container with your fingers. In your PJs. While no one but the dog is watching (how I devoured the last remaining slice).
What do you think? Would you bake a cake in your Instant Pot? If you decide to try the recipe, please be sure to leave a comment. I love hearing from you!