Toffee Mocha Cake

I used to avoid toffee. It was just too crunchy and the bits of sugar would get stuck in my teeth and I’d have to try and fish it out with my tongue while trying to look like I wasn’t. No? Just me? I could never bring myself to fish it out with my fingers in public, although I’ve seen many people do it without batting an eye. Ick. I’ve always been partial to caramels and their chew until I made my own toffee. Unlike brittle or a not-so-great toffee, good toffee not only breaks into delightful shards in your mouth (as opposed to the jagged, sharp chips) but disintegrates into a caramel liquid that is pleasant on the tongue and doesn’t stick to your teeth.
This cake is an ode to toffee and coffee. I call it a mocha cake because there are layers of chocolate cake in the center and chocolate + coffee = mocha. If I had it my way though, it would really be a toffee coffee chocolate cake. What a mouthful.
The cake itself is well balanced with a salty sweet coffee toffee and its chocolate cake. But if you really don’t want to go through with this over-the-top cake, I’m pleading with you to at least try the toffee. That is one worth taking your time making.

Toffee Mocha Cake
(For a step-by-step video of how I put it together, check out my stories on Instagram (@thebusyspatula)!)

You will need:


Chocolate Cake (recipe below)
Salted Nut Coffee Toffee (recipe below)
Coffee Ganache (recipe below)
Coffee Swiss Meringue Buttercream (recipe below)
Espresso Beans (optional)

Instructions:

  1. On a cake board, place one layer of your chocolate cake.
  2. Spread a thin, but even layer of the coffee buttercream.
  3. Spread a layer of the coffee ganache.
  4. Top with the coffee toffee.
  5. Repeat two more times.
  6. Crumb coat the cake with leftover buttercream and set in freezer for about 10-15 minutes or until the buttercream is firm.
  7. Remove cake from freezer and frost entire cake smoothly.
  8. Garnish the bottom of the cake with crushed coffee toffee.
  9. Place cake in freezer until firm, about 20-30 minutes.
  10. While cake is in the freezer, put the leftover ganache in a squeeze bottle and warm up ganache in a cup of hot water. You want the ganache to be runny enough that it will drip down the sides but not so hot that it will melt the buttercream.
  11. Remove cake from the freezer and do a ganache drip down the side of the cake. Fill the top smoothly with coffee ganache.
  12. Place cake in freezer to set.
  13. In a pastry bag fitted with a star pastry tip (I used Wilton’s 1M), swirl buttercream all around the edge of the cake.
  14. Dust the tops of the buttercream with crushed leftover toffee, and garnish each swirl with one espresso bean.

Chocolate Cake:

Ingredients:

1 ¾ c. flour
2 c. sugar
¾ c. cocoa powder
2 tsp. baking soda
1 tsp. baking powder
1 tsp. kosher salt
1 c. buttermilk, shaken
½ c. vegetable oil
2 eggs, at room temperature
1 tsp. pure vanilla extract
1 c. hot coffee

Instructions:

  1. Preheat oven to 350˚ and grease and line the bottom of four 6” cake pans with parchment paper.
  2. In a stand mixer fitted with the paddle attachment, mix flour, sugar, both cocoa powders, baking soda, baking powder and salt until fully combined.
  3. In a separate bowl, whisk vegetable oil, eggs, and vanilla extract until combined.
  4. With the mixer speed on low, add the egg mixture to the flour mixture until combined.
  5. Turn off the mixer. With a spatula, scrape the sides of the bowl to fully incorporate the two mixtures.
  6. Turn the mixer on low and slowly add the hot coffee to the batter. Once added, raise the speed to medium until completely homogenous.
  7. Divide batter evenly amongst the four cake pans and bake for 18-20 minutes, rotating the cake pans halfway.
  8. Let cake cool in pan for 10 minutes, then turn out of cake pan and move onto wire cooling rack to cool completely.

Salted Nut Coffee Toffee:

Ingredients:

1 c. butter
1 c. sugar
1 ½ tsp. espresso powder
1 ½ tsp. molasses
¼ tsp. kosher salt
nuts (I used walnuts and sunflower seeds)
flaky salt (I used maldon sea salt)

Instructions:

  1. Prepare a sheet pan lined with either parchment paper or a silicone baking mat.
  2. On medium-low heat in a small to medium HEAVY saucepan with a candy thermometer attached, mix butter, sugar, espresso powder, molasses and kosher salt together. (I’m emphasizing heavy because I’ve tried with a lighter pan and I ruined my first batch.)
  3. Whisk mixture constantly until temperature reaches 285˚F.
  4. Pour mixture onto the sheet pan and sprinkle your nuts and then the flaky salt.
  5. Let cool and break into shards.

For the Coffee Ganache:

Ingredients:

120 ml. heavy cream
180 g. white chocolate
2 tsp. espresso powder
1 tsp. coffee emulsion

Instructions:

  1. In a microwave safe bowl, heat heavy cream and white chocolate for one minute. Whisk mixture together until it becomes homogenous. If the white chocolate did not fully melt, microwave at intervals of 30 seconds until melted.
  2. Add in espresso powder and coffee emulsion and whisk.
  3. Pour onto the mocha cake layer and put cake in fridge to set the ganache. About 30 minutes to an hour.

Coffee Swiss Meringue Buttercream

Ingredients:

1 ¾ c. sugar
1 tbsp. espresso powder
7 large egg whites
a pinch of kosher salt
5 ½ sticks unsalted butter
2 tsp. vanilla extract
2 tsp. coffee emulsion

Instructions:

  1. Simmer an inch of water in a medium pot.
  2. In the bowl of a standing mixer, whisk egg whites, espresso powder, sugar and salt together.
  3. Place the bowl over the pot of simmering water and whisk the egg white and sugar mixture continuously until the mixture becomes lighter and no longer grainy.
  4. Remove the bowl from the pot and transfer the bowl into the mixer fitted with a whisk attachment.
  5. Mix on high until mixture becomes white and fluffy, and cool (check for this by seeing if the outside of the bowl is cool to the touch).
  6. Add in vanilla extract and butter one stick at a time until a silky smooth frosting forms.
  7. Add 2 tsp. of the coffee emulsion and whip until light brown and homogenous.

Salted nut coffee toffee recipe adapted from The Smitten Kitchen and All Recipes.
Chocolate cake recipe adapted from Food Network.

The Best Mocha Cake

The Best Mocha CakeI rarely ever call anything the “best” because I know there is something out there that’s better. But I’m telling you, this cake is very, very good. Most of the cakes on this website are cakes that I’ve made for my family’s birthday celebrations, and they’ve tasted every single one of them. The good and bad thing about family members is that they are your biggest critics. They’re not too polite to say everything is good when it’s not, and aren’t afraid to tell you that your previous work was better. So when my brother said that it’s one of the best cakes I’ve ever made and requested the same one for this next birthday, I knew it was a winner.
The Best Mocha CakeThis isn’t your average layer cake where you glue rounds of the same flavored cake with some frosting and call it a day. It’s complex and flavorful. With 5 different layers and a jelly glaze, it’s definitely a labor of love. I’m telling you, even I was worn out after putting this cake together, but oh man was it worth it. It’s rich, soft, buttery, light, crunchy and silky at the same time. You can’t mistake the coffee or the chocolate and one doesn’t overpower the other. They’re perfectly balanced.
The Best Mocha CakeFirst, you have a chocolate cookie crust, then a mocha cake: followed by a coffee ganache and then chocolate crunchies with a coffee mousse on top. The whole thing is covered in a coffee mirror glaze that’s very glossy and jelly-like. I’ve never made a mirror glaze before, but I have to say I’m not impressed by the flavor. Please, feel free to peel it off before consuming your cake.
The Best Mocha CakeYou want to make sure to use the very best white chocolate for the coffee ganache. I feel if you use the waxy cheap white chocolate, the balance of the cake will be off. This is the time to pull out the valrhona or the guittard and savor every bite of it.
The Best Mocha CakeThe Best Mocha Cake
Makes one 9-inch cake

*Because there are so many components to this cake, I’ll put the ingredients and the instructions for each layer. I don’t want you to have to keep scrolling up for each ingredient. Note that each layer is layered in the same 9-inch springform pan.

For the Oreo Crust:

Ingredients:
25 Oreo cookies, crushed
5 tbsp. unsalted butter, melted

Instructions:

  1. Preheat the oven to 350˚F.
  2. Spray a 9-inch springform pan with nonstick spray and line the bottom with parchment paper.
  3. Stir the cookie crumbs and melted butter in a bowl.
  4. Press the evenly crumbs into the bottom of the springform pan.
  5. Bake the crust for 8 minutes and cool completely before moving onto the next layer.

For the Mocha Cake:

Ingredients:
½ c. strong coffee, room temp
1 ½ tsp. espresso powder
½ c. whole milk
1 tsp. vanilla extract
1 ⅓ c. all-purpose flour
⅓ c. unsweetened cocoa powder
1 tsp. baking powder
½ tsp. baking soda
¼ tsp. salt
½ c. unsalted butter, room temp
½ c. granulated sugar
⅓ c. light brown sugar

Instructions:

  1. Preheat oven to 350˚F.
  2. In a measuring cup, whisk coffee, espresso powder, milk and vanilla extract together. Set aside.
  3. In a medium bowl, whisk flour, cocoa powder, baking powder, baking soda and salt together. Set aside.
  4. In the bowl of a standing mixer fitted with a paddle, beat the butter and the granulated and light brown sugar together until light and fluffy.
  5. Turn the mixer on low and add in a third of the flour mixture followed by half of the coffee mixture. Repeat with another third of the flour followed by the remaining coffee mixture. End with the last third of the coffee mixture.
  6. Pour about ¾ of the cake batter onto the cookie crust and bake for about 20-25 minutes until the cake is set. Let cool.
  7. *You can bake a few cupcakes with the remaining cake batter to taste test.

For the Coffee Ganache:

Ingredients:
120 ml. heavy cream
180 g. white chocolate
2 tsp. espresso powder
1 tsp. coffee emulsion

Instructions:

  1. In a microwave safe bowl, heat heavy cream and white chocolate for one minute. Whisk mixture together until it becomes homogenous. If the white chocolate did not fully melt, microwave at intervals of 30 seconds until melted.
  2. Add in espresso powder and coffee emulsion and whisk.
  3. Pour onto the mocha cake layer and put cake in fridge to set the ganache. About 30 minutes to an hour.

For the Espresso Chocolate Crunchies:

Ingredients:
10 Oreo cookies
¾ bottle of magic shell
2 tsp. espresso powder

Instructions:

  1. Pulse the oreo cookies in a processor until fine crumbs form.
  2. In a medium bowl, mix ¾ of a bottle of magic shell with the oreo crumbs until thoroughly combined.
  3. Smooth on a layer of crunchies over the chilled coffee ganache.
  4. Evenly sprinkle the 2 tsp of espresso powder over the crunchies.
  5. Chill until the crunchies set, about 15-20 minutes in the freezer or an hour in the refrigerator.

For the Espresso Mousse:

Ingredients:
1 tsp. unflavored gelatin
1 tbsp. water
1 c. heavy cream
2 tbsp. powdered sugar
2 tsp. espresso powder
1 tsp. coffee emulsion

Instructions:

  1. In a small bowl, mix gelatin with water and set aside to hydrate.
  2. Beat the heavy cream until soft peaks form.
  3. Heat the gelatin mixture in the microwave in 10 second increments until melted.
  4. Add in the powdered sugar to the heavy cream and once it is mixed in, add in the gelatin slowly.
  5. Whip until semi-stiff peaks form. Add in the espresso powder and the coffee emulsion.
  6. Whip until stiff peaks form.
  7. Lay a smooth layer of the espresso cream on top of the crunchies using an offset spatula.
  8. If desired, you may use the remaining ¼ of the magic shell from the above recipe and smooth it over on top of the mousse to create a smoother top for the cake.
  9. Chill in the refrigerator until firm, about an hour.

For the Espresso Mirror Glaze:

Ingredients:
1 ¼ c. water, divided
3 tsp. unflavored gelatin
1 ¾ c. granulated sugar
1 tbsp. espresso powder
1 tsp. coffee emulsion
white chocolate (for decoration)
gold leaf/ gold flakes (for decoration)
gold sanding sugar (for decoration)
silver dragees (for decoration)

Instructions:

  1. In a medium bowl, mix ¼ c. water with 3 tsp. gelatin and set aside for 5 minutes.
  2. Add 1 cup of hot water to the gelatin mixture and whisk until gelatin has dissolved.
  3. Add in sugar, espresso powder and coffee emulsion and whisk until smooth.
  4. Once mixture is thickened and cooled, about 20-25 minutes (it should be viscous, I didn’t wait long enough and it wasn’t as thick as I would’ve liked), remove the cake from the refrigerator and unmold from the springpan.
  5. Place cake on top of wire rack with a sheet pan on the bottom.
  6. Pour the gelatin mixture evenly over the cake and let it set. This is a messy move, you will have leftover gelatin all over the bottom of the sheet pan. There is no saving it, just let it go.
  7. While the cake sets, melt about ¼ c. white chocolate in piping bag with a tiny hole cut at the end. Drizzle over one side of the cake in straight lines.
  8. Sprinkle the gold sanding sugar and silver dragees over the same side.
  9. Add the gold leaf.
  10. Chill in fridge until ready to serve.

Oreo crust recipe adapted from Crazy For Crust.
Mocha cake recipe adapted from Brown Eyed Baker.