Note: Since Valentine’s Day is just around the corner, I’m bringing up this chocolate wonder from the step-by-step archives. Serve this with your V-Day dinner! I absolutely loved it. –Ree

The second I read the name of this recipe, I just knew I had to make it. First of all, I love any recipe with either “mystery” or “surprise” in the title. Second, I love any recipe with “mocha” in the title. It means good things will happen.
So “Mystery Mocha?” Count me in!
I thought it was funny that halfway through the printable recipe, the submitter (thanks, Larry!) warns us that “this will look TERRIBLE”. You’ve got to love the honesty!
But no matter what it looks like halfway through, the end result is all that I wanted it to be…and more. It turns out a little bit like a lava cake or baked fudge, but with a lovely coffee undertone. I served mine with freshly whipped cream and absolutely loved every bite. This is a treasure!
Here’s how you make it.

Melt butter and unsweetened chocolate in the microwave for about 45 seconds.

Stir it until the mixture is totally melted and smooth.

Sift together sugar, flour, baking powder, and salt. In a separate container, mix together the milk and vanilla. Set aside.

Mix together the sifted mixture, the chocolate mixture, and the milk/vanilla mixture.

Stir it together until all combined, then spread in a thoroughly greased square pan. Mine was about 6 1/2 x 6 1/2, but 8 x 8 would work fine.

Now, this is where it starts getting weird. In a separate bowl, mix together sugar, brown sugar, and cocoa powder.

Stir it to combine…

Then sprinkle the mixture evenly over the top of the cake batter.

Interesting! What does it all mean?

After that mixture is evenly sprinkled and distributed, pour cold coffee all over the top. I didn’t have any coffee made, so I mixed instant coffee crystals in a cup of water. And I made it very strong: two heaping tablespoons of coffee! We’ll see how it turns out.

This would definitely be the part in the recipe where Larry warns “it will look terrible!” I don’t think it looks terrible at all, though…just curious!
Bake for 40 minutes on 350 degrees, then remove from the oven.

And this…THIS is what it looks like!

Oh my word. Oh my.

It’s funny—until I scooped into it, I didn’t realize this would be a lava-type cake. It was a nice surprise!

Gorgeous! And it smells so, so good.

I whipped some cream and plopped it on top.

And this turned out to be a very good move.

The Verdict: This was absolutely delicious. If you use very strong coffee, the flavor will really come through and result in a very rich mocha flavor. This would be perfect for company—so easy to make!
Thank you, Larry, for sharing such a yummy recipe.
Recipe
Recipe Description
My mother’s secret recipe, no longer secret! Decadent chocolate cake with mocha pudding inside. For chocolate lovers, this is a ten.
Preparation Instructions
Sift together 3/4 cup sugar, flour, baking powder, and salt. Set aside.
Melt square of unsweetened chocolate and butter in the microwave. Add to dry ingredients alternately with the milk and vanilla. Blend. Pour into a greased 8×8 pan.
Combine brown sugar, the 1/2 cup additional granulated sugar and cocoa powder. Sprinkle over the cake batter. Pour the one cup COLD coffee on top. This will look TERRIBLE. Bake 350 degrees for 40 minutes.
Serve warm with ice cream or sweetened whip cream or whipped topping. This will serve 8. In a 9×9 square pan, you can cut 9 pieces. Best served warm.
Ingredients
- ¾ cups Granulated Sugar
- 1 cup Sifted All-Purpose Flour
- 2 teaspoons Baking Powder
- ⅛ teaspoons Salt
- 1 piece Unsweetend Chocolate (1 Square)
- 2 Tablespoons Butter
- ½ cups Whole Milk
- 1 teaspoon Vanilla Extract
- ½ cups Brown Sugar
- ½ cups Granulated Sugar (additional)
- 4 Tablespoons Powdered Cocoa (Not Drink Mix)
- 1 cup Cold Strong Coffee











Jessica @ How Sweet It Is on Tuesday, June 22
That sounds insanely delicious! I love mocha ANYTHING, so I'd be all over this.1
Lizzy on Tuesday, June 22
Mmmm, my grammy makes this exact cake only she calls it "Chocolate Upside-Down Pudding Cake". She puts chopped pecans in the cake batter part and uses hot water on top, but coffee sounds so awesome! Can't wait to try it!2
Sarah Fowler on Tuesday, June 22
This sounds (and looks) pretty much exactly like chocolate cobbler, except with coffee instead of water. Either way, yum!3
Meg on Tuesday, June 22
Mmmmm. That looks SO good! I'm putting that on my "to-do" for the weekend!4
Ciaochowlinda on Tuesday, June 22
This looks so decadently delicious. It combines two of my favorite flavors in a burst of wonderful tastes.5
Katie@Cozydelicious on Tuesday, June 22
Oh wow. I love the eintage feel of this recipe - especially served in those adorable blue bowls with a huge dollop of cream. I kind of want to put on my frilly apron and get cooking!6
Jeanette on Tuesday, June 22
I'm thinking I will try pouring this into individual ramekins after mixing it - then it will be like an individual little mocha lava cake!7
Grace on Tuesday, June 22
So excited to try this!8
sweetebakes on Tuesday, June 22
You had me at mocha.9
kristen on Tuesday, June 22
My grandma used to make this (w/out the coffee--just hot water) and we called it "brownie pudding." My favorite way to eat it is in a bowl with half and half. The addition of "mocha" sounds fabulous!10
Patty on Tuesday, June 22
I wonder how this would taste with a fruit juice instead of coffee? Orange or raspberry juice? Those two fruits play nicely together with chocolate!11
Mary Lou on Tuesday, June 22
This reminds me of the ugly cake mix that Tastefully Simple use to have. I always got rave reviews when I served it for company! And it was just a mix so this recipe is from scratch...even better.12
Laura T. on Tuesday, June 22
Wow, could this look more decadent?!?!13
Wenderly on Tuesday, June 22
Coffee is my life- this would fit beautifully into my coffee addiction...think I might try it with a via packet!14
Debbie on Tuesday, June 22
I am going to try this with Hot Chocolate since I do not like Coffee. OR maybe Cherry Pepsi??? Looks awesome15
beckybook on Tuesday, June 22
I am so making this when my in laws come visit!16
Holly in FL on Tuesday, June 22
I used to make something similar to this, but with water instead of coffee. I'll have to try the coffee version. Thanks for the reminder...I'll have to go find my old recipe to compare! Smiles! ~Holly17
Lea on Tuesday, June 22
I've got this in the oven right now. :)18
A Cozy Kitchen on Tuesday, June 22
Oh my! This looks sinfully amazing. I love the addition of coffee-it seriously makes anything chocolatey so much better.19
esthera on Tuesday, June 22
It does look exactly like the Chocolate Cobbler recipe on Tasty Kitchens. Which is to die for! Yummmm. Especially with vanilla ice cream on top. Only real difference is that this has coffee. I gotta try that...my coffee addiction says so. :)20
Jennifer Jo on Tuesday, June 22
I make a cake that's almost exactly like this, and you're right, it's marvelously rich and delicious, creamy, cakey, gooey, etc, etc, etc, YUM. It pairs nicely with vanilla ice cream, too.21
Harmony on Tuesday, June 22
This looks really interesting...certainly not your average dessert. Since my daughter and I love all things coffee (not to mention chocolate) I'll be making this in the very near future. I've just discovered PW and am enjoying my time here. From one Okie to another.....thanks Ree!22
AlishaJaybird on Tuesday, June 22
Oh. My. George. I don't know whether to love you people or despise you into oblivion. I am going to have to try this now. As in, right this very second.23
outnumberedbyboys on Tuesday, June 22
Wow! I just happen to have saved some coffee in the fridge from the other day. Maybe I'll do this for our delayed Father's Day celebration tonight. Yum!24
Kaleena Hall on Tuesday, June 22
I cmae up with this recipe years and years ago and it is super yummy. Didnt know anyone else made the same thing. Glad you put it on though, it is super yummy!!!!25
rozanie on Tuesday, June 22
Yum. Def sounds similar to brownie pudding (or chocolate cobbler), but with coffee instead of water. :) Can't wait to try it!!!26
juliemdaniel on Tuesday, June 22
I am about to reach through the computer screen and shovel this in my mouth. Holy bananas.27
pickypalate on Tuesday, June 22
Gorgeous! Chocolate....I love you!28
Ranchers_Wife on Tuesday, June 22
I have made this recipe for years. It rocks icecream. YUMMY!!29
Dereth on Tuesday, June 22
I made the chocolate cobbler recipe a couple weeks ago and fell in love with it. I have to make a gluten-free version for my co-worker. And when I finished it, I thought "This tastes delicious with my cup of coffee. I bet if I used hot fresh strong coffee instead of water, it would be the BEST!" Clearly, hungry minds think alike!"30
Mary on Tuesday, June 22
That reminds me of a chocolate pudding cake31
Michele on Tuesday, June 22
Oh my goodness. This looks A-MAZING. Thanks for posting this...I'm so excited to try this!32
Leah. on Tuesday, June 22
Oh. My. I must make this.33
--Vee on Tuesday, June 22
There's a recipe in the Betty Crocker cookbook for something like this (with just water though, not coffee) called "Hot Fudge Cake." Mom used to make it all the time when we were growing up. Really good with a little vanilla ice cream.34
callimakesdo on Tuesday, June 22
My mom used to make something like this. I loved the chewy crunchy top with the chocolaty syrupy middle. She didn't use coffee though. And since coffee makes any chocolate all the better, I bet this is amazing. I can't wait to try.35
Misti Kallas on Tuesday, June 22
It is on like Donkey Kong!!!!!!!36
Mary M Taylor on Tuesday, June 22
So easy and all ingredients is things normally kept on hand..I used instant coffee as well ...YUMMY.....37
Margaret on Tuesday, June 22
Reminds me of EarthQuake Cake. Yumm!!38
Manu Miranda on Tuesday, June 22
OMG! Ugly? Maybe. Delicious? Of course!!! I'm trying this one next weekend =D Thanks39
Kari Anne on Tuesday, June 22
That sounds YUMMY... I think I have everything in the pantry that it calls for... I may just make this for tonight...40
Karen on Tuesday, June 22
mmmm, i want to go to there!41
Jennifer on Tuesday, June 22
Looks so good! Love the blue plate too! I collect blue and white. Who made it?42
Helen on Tuesday, June 22
We make one like this and call it Devil's Float! Instead of coffee we use hot water and put pecans in the cake batter part of it and bake it in a dutch oven when we go camping. It's even good cold the next morning.43
Christy on Tuesday, June 22
We made this all the time as a kid and called it "hot fudge pudding cake". It is amazing fresh out of the oven...but put a piece in the microwave for 15 seconds, dollop on the vanilla ice cream and you have a perfect dessert anytime!44
Lydia on Tuesday, June 22
Yup! I've been making this cake for 40 years as chocolate pudding cake. It is a definite go to for a quick chocolaty dessert . It's one of my family's favorite!!!45
LesPlaisirs on Tuesday, June 22
Hello from Down Under. What a temptation. Too hard to resist. Love your site. Will keep tuned. Kind Regards, Les PlaisirsduPlat (Pleasures of the Plate)46
Amanda W. on Tuesday, June 22
Yummy yummy for my tummy! Looks delicious, must try this soon!47
NRLong on Tuesday, June 22
Oh, Lord. There goes my diet. I'm dying from those photos.48
Georgia Pellegrini on Tuesday, June 22
Wow, that looks fantastic. I'm off to the store now to buy some chocolate...and coffee...and...everything on that list49
Jackie and Alyssa on Tuesday, June 22
Just made it. It's in the oven cooking! Can't wait to eat it:) Looks veryy good:)50