Fudge and peanut butter and fudge and peanut butter and fudge and peanut butter and fudge: With fudge on top

Drake’s Funny Bones. Ben & Jerry’s Chubby Hubby. Reese’s Pieces. Twix PB. Peanut M&Ms.

Peanut Blossoms. Magic in the Middles. Peanut Butter Whoopie Pies with Chocolate Filling.

Oh, and let’s not forget “The Chocolate Peanut Butter Gallery, dedicated to the world’s two best ingredients” Web site. (Sorry, you’ll have to Google that one yourself.)

You see where I’m going here? If you’re all over it, like I am – read on.

Chocolate and peanut butter go together like… well, like chocolate and peanut butter. It’s an unlikely combination, but there are those of us – indeed, legions of us – who love it.

Is it simply the happy marriage of two childhood favorites?

No, because otherwise we’d be lusting after Cheez-Whiz and grape jelly.

Is it their complementary textures – creamy, and creamy? Their assertive flavors? I AM NUT, YOU ARE CHOCOLATE. HEAR US ROAR.

Or are they simply a good-looking couple? They’ve got that classy black-and-gold thing going, big-time.

Whatever the reason, chocolate and peanut butter, two of the New World’s finest native products, have been playing happily together for decades. George Washington Carver invented “modern” peanut butter in the 1880s. Forty years later, the H.B. Reese Candy Company offered peanut butter filling dipped in Hershey’s chocolate: the first peanut butter cups.

Then there are Buckeye candies, peanut butter balls dipped in chocolate (a.k.a. Ohio’s unofficial state dessert). They’re the inspiration for this towering, multi-layered, ganache-drizzled cake:

Buckeye Peanut Butter-Fudge Cake.

Read it and eat!


Here it is again, star of stage, screen, and bowls of batter everywhere – espresso powder! No, it doesn’t make your treats taste like coffee (unless you add enough). It just absolutely enhances the flavor of chocolate.

OK, let’s jump in. First, turn your oven on to 350°F, so it can preheat while you make the cake batter.


Put the following ingredients in a mixing bowl:

2 cups granulated sugar
2 cups (8 1/2 ounces) King Arthur Unbleached All-Purpose Flour
2 tablespoons Instant ClearJel or cornstarch
3/4 cup Double Dutch Dark Cocoa or Dutch-Process cocoa
2 teaspoons baking powder
2 teaspoons espresso powder
1/2 teaspoon baking soda
1 teaspoon salt


Stir to combine.


Add 4 large eggs, 3/4 cup vegetable oil, and 2 teaspoons vanilla extract.


Beat till well combined; the mixture will be fairly thick.


Next, add 1 1/4 cups cold water, beating until smooth. As you can imagine, this has the potential to be a messy project. To avoid  chocolate splashes, add water gradually, draping a dish towel over the top of the mixer, if necessary.


Get out two 8” x 2” round cake pans. Note: These pans need to be at least 2” tall; if you have non-standard, shorter 8” pans, substitute 9” round pans.

I’m using our new USA Pans here. They’re made by the USA Pan company which, surprisingly, is the world’s largest supplier of commercial bakeware to the foodservice industry. And they make their pans right in Crescent Township, PA., not overseas someplace. Well, who knew?

And now, a word from our sponsor. I want to take a moment to wax eloquent about USA Pans. You might think this is a sales pitch; I just consider it well-earned enthusiasm. Here’s what they have going for them:

•Sturdy, heavy-gauge aluminum/steel. And, so you can feel eco-friendly, the steel is 65% recycled.

•The perfect color: dark gray. Not so dark they burn; not so light they leave your crusts pale.

•Corrugations: they increase airflow, which bakes bottom crusts thoroughly without burning. “Yeah, but won’t the corrugations leave creases in my cake?” No, not if you use parchment. And even if you don’t use parchment, they’re so faint that once you add the icing, you can’t see them.

•FDA-approved, environmentally friendly, hard-glaze silicone non-stick coating. Surprisingly, even sticky buns slip right out of these pans.

• And, the reassuring words you love to see: lifetime warranty.

Right now we have 8” and 9” square and round pans; and a 13” pain de mie. Coming soon: 9” pain de mie (VERY exciting – a pain de mie pan for a standard loaf); 9” pie pan; and three sizes of rimless cookie sheets.

Plus anodized aluminum standard AND deep-dish pizza pans, 12” and 14”. And let me tell you – I’ve been lobbying for anodized aluminum pizza pans for a long, LONG time. Their dark finish gives your pizza crust wonderful crunchy/crisp texture.

And now, back to our program.


I do tend to use parchment for cakes, out of habit. It’s a good little insurance policy. So, take a sheet of parchment, and lay the pan on top. Draw around with a marker, then cut out a round. Or, even easier – use pre-cut parchment rounds.


Spray the pans with EverBake or your favorite non-stick spray. Then line with parchment, and spray the parchment.


Divide the batter between the two pans. If you have a scale, you’ll put about 689g in each; that’s about 24 3/8 ounces, in American measurements.


Into the 350°F oven they go.


Bake the cakes for 35 to 38 minutes (a bit less if you use a 9” pan), or until a cake tester inserted into the center comes out clean.


Cool the cakes in the pan for 15 minutes, then loosen their edges with a thin nylon spatula, or table knife.


Turn over onto a rack…


…lift off the pan, and peel off the parchment. Repeat with the other layer.

Let the cakes cool completely; or at least till they’re just barely warm.


Pick up one layer (a giant spatula is always a help)…


…and transfer it to a piece of parchment or waxed paper or foil – just something so it’s not sitting right on your counter. Use a long serrated knife to cut the cake in half around its circumference.


Now your single layer has become two.


And your two layers, four.


Time to make the peanut butter filling. Put the following in a mixing bowl:

4 cups (1-lb. box) confectioners’ sugar
1 1/2 cups peanut butter
2 teaspoons vanilla extract

Note: I haven’t tested this with “simply ground peanuts” peanut butter, just the regular Skippy-type.


Mix till well combined.


Gradually add 3/4 cup milk. Again, watch out for splashes, this time of the peanut-butter variety.


The filling should look like this. And should taste like heaven.


Put one layer on a serving plate. Spread about 1/3 of the filling (about 290g, a generous 10 ounces) on top.


Repeat with the remaining layers.


Put the final layer on top.


It helps to anchor the layers with some bamboo skewers. Or clean broom straws, like I’ve used here.


Next – the icing.  Put the following in a microwave-safe bowl or measuring cup:

1 1/3 cups (8 ounces) chocolate chips or chopped semisweet chocolate
1/2 cup heavy or whipping cream
2 tablespoons light corn syrup


Heat in the microwave till the cream is hot and the chocolate soft. Then stir…


…and stir, till the mixture is completely combined. Don’t get nervous; at first it seems like a gloppy mess that’ll never come together. But it will. It does.


Pour the ganache (yes, that’s what you’ve just made, ganache) atop the cake. Those creases are actually from the cooling rack, not the pan.


Spread the ganache atop the cake…


…and encourage it to dribble down the sides.


Give it some time to set – a couple of hours is good – then serve, to rounds of applause and the lusty singing of “Happy Birthday,” if apropos. Be sure not to serve anyone a piece with the bamboo skewer still intact.


Uhhhh…. yeah, this is what we do in the test kitchen. I didn’t like how the first attempt at icing poured. So I made another batch, and poured it right over the first. Then my Web mates started getting into it. I just HAD to take a picture. How’s THAT for a glamour shot?!

Read, rate, and review (please!) our recipe for Buckeye Peanut Butter Fudge Cake.

Buy vs. Bake

Buy: Expresso Italian Villa, Charlottesville, VA: slice of Chocolate Peanut Butter Buckeye Cake – rich, moist chocolate cake with a creamy peanut butter filling and a thick, chocolate ganache topping, $4.25

Bake at home: Buckeye Peanut Butter-Fudge Cake, 2” slice (1/12 of cake), 87¢

PJ Hamel

PJ Hamel grew up in New England, graduated from Brown University, and was a Maine journalist before joining King Arthur Flour in 1990. PJ bakes and writes from her home on Cape Cod, where she enjoys beach-walking, her husband, two dogs, and really good food!


  1. Kelly

    I have been wanting to make this cake for a while now, and this weekend I finally decided it was time. I am a very experienced baker, so I’m not sure what I did wrong, but the cake was extremely dry. I cut a slice of cake, took a bite, and proceeded to separate the cake layers from the peanut butter filling, throw the cake pieces away, and eat only the peanut butter filling (which was excellent). I was very disappointed!! I mixed it as little as possible, so I’m not sure what I did wrong. I’ll try it again someday, though.

    Sorry about your experience with this recipe, Kelly. Try calling our Baker’s Hotline (802-649-3717), they can try to figure this out with you. PJH

  2. Melissa

    i just made this yesterday for a small dinner party — it was a huge hit! i couldn’t find my 2nd 8″ round pan, so i used 2 9″ squares. i also didn’t halve the layers, so it was only a 2 layer cake, which meant there was LOADS of peanut butter filling in the middle, but really not *too* much.

    it was amazing. thanks!

    Glad it went over well, Melissa – I love it when you can “make do” with alternate pans and everything turns out fine. I wish more people would feel free to do that; baking really is NOT brain surgery, and it’s hard to totally goof something up, in my opinion. PJH

  3. Misty

    I have made this before and it is EXCELLENT! I lost my recipe and just had to come back and get another one! I did not try it with espresso before but I sure will this time…Thanks and everyone who reads this just please know this is welllllll worth the sugar rush!! lol…Mississippi

  4. Lorena

    I made this around a week ago for my wonderful husband and I have a question and a comment. I thought the cake turned out great. However, I normally like a dark chocolate buckeye coating, so I used a bittersweet chocolate chip on my frosting – WHOA – it was awful. Lesson learned, use the semisweet as suggested next time – or are there any changes one could make to make the glaze (as it hardened and wasn’t technically in my book a frosting) sweeter without losing that dark flavor?

    Finally, a comment. I know, at least for me, there was a lot of PB filling and a LOT of cake scraps left over from leveling and de-crumbing and such. They looked too good to waste, so I chucked them in a batter bowl, put the lid on, and tossed it in the freezer. Yesterday, I took it out of the freezer, craving some more of that (now-gone) cake and just scooped it out like the world’s best ice-cream. Wow. What a great sundae accompaniment.

    Lorena, Now that sounds like a delicious use of “scraps”! To achieve a smooth shiny glaze when moving from semi-sweet to bittersweet chocolate, you will need to increase the amount of corn syrup. Treat this as an experiment, as different bittersweet chocolate will have their own unique “tipping” point for this adjustment. Frank @ KAF.

  5. Laura

    Wow! This is a wonderful cake! I made this over the weekend for a large group and it was a hit. I made two substitutions. First, I had no espresso powder, so instead I substituted brewed coffee for part of the water called for in the cake recipe. We also substituted crunchy peanut butter for the creamy used in the filling. The cake came out perfectly. We didn’t use the bamboo skewers and did not have any problem with sliding layers as we transported the cake across town. Perhaps it was the crunchy peanut butter in the filling?
    Thank you for the wonderful recipe!

  6. Buckeye Baker

    The recipe sounds great! Since there seem to be some issues with transporting this cake, could the components be made individually, and then assembled “on site”? If so, would the peanut butter filling and/or ganache need to be refrigerated during transport? Could either be microwaved to re-warm? Thanks in advance–Go Bucks!

    Neither would need to be refrigerated, Buckeye. the filling might need a bit more milk stirred in if it stiffens up; and yes, the ganache can be heated in the microwave to make it pourable. So sure, you could definitely assemble on site. Still, do bring the skewers, OK? they help as you assemble, and you can remove once the ganache has set some. Good luck – PJH

  7. Dee

    I had such high hopes for this recipe! I’m quite the avid baker, I bake all the time but this recipe completely disappointed me and I feel a little bummed now. I followed everything to a T and yet the cake came out overly dense and rubbery. I don’t know what went wrong but if it helps, I used an 11′ square pan instead. Really hope someone can help me out…=(

    Sounds like your baking powder was bad, Dee – that’s the usual reason for a dense, rubbery cake. Did you use King Arthur Flour and Dutch-process cocoa? Both of those would make a big difference, too. Also, perhaps an 11″ square pan just offered too much inner area without support (no pan rims), unlike two 8″ round pans. Sorry this didn’t work for you! PJH

  8. Alison T

    To Penni on Sept 11 – I live at 5300 feet, didn’t adjust anything, and it rose well. My biggest issue is that I’m in Utah, and it’s drier than dry here. I tend to compensate for the flour’s dryness by upping the liquids, but in this case I didn’t and it all came out perfectly well. Generally speaking, each KAF recipe I’ve tried has done well without high altitude adjustments, not sure if that’s dumb luck or what. Good luck.

  9. FRAN S

    When I was a kid (long time ago) my girlfriend’s mom use to make a banana sheet cake (13×9) that had a thin layer of white frosting (buttercream?) and then a thicker layer of chocolate frosting. I have never been able to re-create it. Does anyone have any ideas? Thanks

    Fran, To achieve a “double” icing, you will want to chill the cake after the application of the first layer. Once this is firm, you may add the next layer without the 2 intermingling. Frank @ KAF.


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