JOIN! 12 Weeks for $1

Chocolate, Prune and Rum Cake

12 Servings

1 hr 20 min 30 min active

Made This Recipe? Write a Review.
Thank you for submitting your review! A member of our team is confirming the review meets our site's Community Guidelines. It will be posted on the site shortly.

We were smitten with Claire Ptak’s chocolate, prune and whiskey cake, but when we got the recipe back to Milk Street we knew we needed to make adjustments. Most home bakers aren’t as skilled as Ptak, and we wanted a cake people would fall in love with on the first try – as we did when we tasted her version. Her cake is deliciously gooey at the center, and we wanted to keep that. A ratio of 3:1 chocolate to butter – as well as 8 ounces of chopped pitted prunes – got us the results we wanted. We tried a variety of chocolates and preferred bar chocolates with 60 to 70 percent cacao (especially the Ghirardelli and Guittard brands). Chocolate chips contain stabilizers that can change the cake’s texture; it’s best to avoid them. Ptak uses almond flour, not an uncommon ingredient in flourless chocolate cakes such as this, but certainly not a common ingredient in American homes. In an effort to streamline, we reworked the cake a bit to leave it out and found the results just as good. At first we questioned the need to whip the egg yolks and whites separately, but we discovered it made a big difference. Whipping the yolks helps maintain the emulsion of chocolate and butter; skipping that step produced an unpleasantly dense cake. And of course by now we understood the value of under-whipping the egg whites and just barely mixing them into the batter. Ptak originally made this cake with Armagnac, but later switched to whiskey. We couldn’t easily find the former, and the latter – while delicious once the cake was cooled – tasted harsh when the cake was warm (and this cake begs to be eaten warm). We found dark rum tasted delicious warm or cooled and better complemented the molasses.




Don’t over-bake this cake. Don’t be alarmed if the center still jiggles a bit and yields to gentle pressure; the cake will continue to set after it comes out of the oven.

1 hr 20 min

30 min active


  • 9

    tablespoons (1 stick plus 1 tablespoon) salted butter (1 tablespoon softened)

  • 8

    ounces pitted prunes (about 1½ cups), finely chopped


Pardon the interruption

You need to be a Milk Street Digital Member to see the full recipe


and get access to all of our recipes and articles online, as well as in print.

How we use your email.

Your email address is required to identify your subscription. We will use it for customer service as well as other communications from Milk Street. We will not share, or rent your email address.

Jeffrey F.
March 19, 2023
Loved it!
This was rich and decadent with a pudding-like texture. I baked our’s 35 min and it looked much like the picture. I can definitely see how this would not be for everyone. That being said, the texture of this recipe is heavily reliant on the treatment of the eggs, meaning properly beaten whites, folding technique, as well as time and temperature in the oven are all crucial to success.
Allison V.
December 5, 2022
Loved it!
Easy to make and delicious. My family was not put off by the flavor combination.
Diana L.
March 3, 2023
Tastes so good but ...
I watched Milk Street episode about this cake. They talked about the author Claire Ptak so I bought her book. I did this recipe from her book but the technique and how to properly whip the egg whites came from Milk Street. It is so important not to overdo it. I made this cake and its delicious. In her book, she provides different temperatures for baking it. I have a convection oven, so I put in for 35 min at 320. In the regular oven, she has suggested to bake at 355. It came out just right.
Chris B.
June 23, 2022
Michele R.

All of the ingredients are things we love and our taste buds had high expectations for flavor that weren't quite met for them in the outcome here. Made per recipe but... Side note is we found this much better the day it was baked than as leftovers the next day. We were glad we tried it but it would not be a repeat. Different strokes for different folks.

Cora D.

Completely agree with Michele's comment. This tasted off; the prunes, bittersweet chocolate, and rum combo do not taste good together. The texture of the prunes in the cake is unfortunate. It was a disappointing result considering it sounded so delicious!

Sarah W.

I made this and found it inedible. The flavor of the rum was so strong it overwhelmed any other flavors. It tasted like it had been soaked in raw alcohol. I had to throw it away.

Sam L.

We made this last night for my birthday. We should have looked at these posted comments. Both my wife and I agree , this cake was horrible . What a waste of time and ingredients.

Scott P.

No, this cake is not for everyone, but I found the flavor combo bold and delicious. I topped it with Greek-yogurt-flavored whipped cream.

Andree B.

I made this cake for Valentine’s Day, was excited by the combination of prunes, molasses and dark rum, all ingredients I love. As it baked I found the smell a bit “curious”, not the nice chocolate smell I was expecting. The cake looked beautiful and cut wonderfully with a very nice moist crumb; but the taste was disappointing. I don’t think the dark rum worked well, may try again using brandy. I agree with the comments above that the cake tasted better the second day and is certainly not for everyone, but it won’t be wasted! Topped with frozen vanilla yogurt helps tone down the “peculiar” flavour.