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.
Here’s a link to the printable, folks:



























Bethany on Friday, February 11
Made this last night--oh my oh my oh my! Delish!101
Leslie M on Friday, February 11
I just made this, but it did not stay moist inside - all the gooeyness fell to the bottom :( What did I do wrong??? I used a 9x9 pan, and left 35 minutes in the oven... But let me tell you that it tastes amazing anyway, just not gooey like the pictures.102
Heidi Stone Photography on Friday, February 11
I wonder if this would work with hot chocolate on top.103
Kymberley on Friday, February 11
The last movie I saw in the theater was Secretariat with my 8 year old son. It was great! Any movie made for grown-ups we have to wait for the Netflix release!104
Sue on Friday, February 11
Up105
Vanesa on Friday, February 11
This looks really good! Serve it for dessert and you and your Valentine might just be up all night! (hopefully making good use of your time!) Lesley M - I wonder if 9x9 is too large a pan for the recipe? I looked back over the recipe & Ree used a 6 1/2 x 6 1/2 size pan and said and 8x8 would probly work. I haven't made it yet-but after seeing your comment I think I'll make sure to 8x8 or smaller.106
Kathy on Friday, February 11
it's not a mystery ---- it is chocolate love. :)107
Peggy on Friday, February 11
Haven't seen a movie in a long time. Did see the band Pure Prarie League in concert last night though. Wonderful!!! Does that count?108
Carol Maryott on Friday, February 11
Yummm! I have been craving chocolate for weeks now. I will definitely make this soon. I have a fabulous chocolate espresso pudding cake recipe from a Jenny Craig cookbook. It will be fun to compare the recipes .Thank you for this valentine's Day treat !109
Heidi on Friday, February 11
This is old school with a new twist of mocha! Love this dessert. Probably one of my first dessert recipes I ever made. I might just need to have my daughter learn how this weekend! =)110
Lazy Beth on Friday, February 11
Mmmmmmmmmmmmmmmmmmmm111
beckysue on Friday, February 11
I am pretty sure this is what my husband calls fudgy pudding cake except they used water. Thought he was crazy the first time I made it. This with coffee sounds soooo much better.112
Sara on Saturday, February 12
I made this last nite for my hubby in a heart shaped pan ... he calls it crack! So delicious... WOW!!!113
Vicki C. on Saturday, February 12
Made this last night and WOW! I used DARK chocolate and doubled the amount. I cut back on the white sugar some and also added about a half tsp of cinnamon which was a wonderful touch. I also added a bit more vanilla flavoring and made instant coffee and used 2 heaping tsp to one cup of water. It turned out fantastic and I thank you for this recipe!114
Vicki C. on Saturday, February 12
I forgot to add that next time I make it I am going to add a pinch of cayenne pepper!115
Carol on Saturday, February 12
I want to halve the recipe and bake it in four ramekins. Any ideas on how long I should reduce the baking time?116
elizabeth on Saturday, February 12
This looks really really yummy! I'm going to see you today at the Tattered Cover in Denver! Can't wait.117
maxiwe on Saturday, February 12
I've made this in the hot fudge cake version. I love the idea of using coffee on top to make it a mocha dessert. This is on the menu for my Sunday lunch. Can't wait to try it!118
Jennifer G on Saturday, February 12
OH. MY. GOSH.!!!!! Just made this and it is scrumptious!!! At Ree's recommendation I topped with fresh whipped cream. I could eat the entire pan all by myself!!119
Karen on Sunday, February 13
In Australia this is quite common and we call it self saucing pudding. A favourite in winter because it's quick, easy and only uses pantry ingredients. It's my 11 yr old daughter's signature dish!120
minnow on Sunday, February 13
SO easy and absolutely delicious! My wonderful mother-in-law taught me to bake and she always added coffee to anything chocolate she made. I wish she was still with us - this recipe just screams Audrey!!121
Janet M on Sunday, February 13
I am thinking I must add some crushed Heath bars to this-- as my favorite ice cream is coffee heath bar crunch. Oh-- i can taste it now.122
PAULA on Sunday, February 13
yes i will be making this,,,,,,love coffee. i made ur fried steak w/ crash potatoes last night! yum, my man loved it so :)123
Health Review Site on Sunday, February 13
The food is very tasty. thanks for the very detailed info about this food. I suggest that added health information contained in those foods.124
Betsy on Monday, February 14
I made this last time you posted it and it is absolutely wonderful!!125
amanda on Monday, February 14
this is so good! perfect for valentine's day! thanks126
sduffy on Tuesday, February 15
At the stores (both grocery and dollar) we have these Sauce 'N Cake mixes that make something just like this. They come in 5 different flavours, and just like this cake they look very strange when they go in the oven but the result is a moist cake with a lovely sauce underneath. A baking miracle! http://www.oetker.ca/en/product/baking-mixes/sauce-n-cake127
Randie K on Saturday, February 26
It looked awesome, and smelled even better. But I didn't care for it at all:( Cloyingly sweet, but not in a chocolate-y way. Bummer.128
Sarah Christmas on Monday, February 28
We call this Hot Fudge Sundae Cake as coined by the Betty Crocker Cookbook. A friend gave us this recipe years ago, and then I happened upon it in my falling-apart BC Cookbook. There was a little history note in the book that said they recommended it during WWII as a substitute for more conventional cakes, because the original recipe uses oil instead of butter, and contains no eggs, as these were in short supply due to rationing. :) I've been dying to try it with applesauce instead of oil OR butter. Such a great recipe! You can also add nuts, raisins, MARSHMALLOWS(!!!), or peanut butter. Can you say versatile? YUM!129
handmade kitchens on Tuesday, March 1
very nice, I wish I could make something like that! never have the time130
Tyson on Tuesday, May 17
Thanks for the photos. They really help out while trying this at home.131