Tunnel of Fudge Cake
Tunnel of Fudge cake was made famous by the Pillsbury Bake-Off. This version from America’s Test Kitchen is chocolatey and indulgent, as the name would suggest.
Hello beautiful!
This cake just screams indulgent with it’s chocolatey cake filled with a gooey underbaked center and topped with a chocolate glaze. It’s the perfect dessert to impress friends, family members, or that special someone in your life.
I made this cake for dinner with some friends. We all went back for seconds. As you can see in the pictures, I overbaked mine a smidge since my tunnel wasn’t quite as gooey as other pictures I’ve seen of this cake. I can tell you that I’ve made it again since taking these pictures and baked it a few minutes less and it had a more gooey-underbaked center. So my suggestion is to take the cake out a little before you think you need to.
I served the cake with some fresh raspberries and at the last second added some freshly whipped cream to the table as well. Even for this chocolate lover, I enjoyed the berries and cream to cut through the intense chocolateness coming from this cake.
I love the tip from America’s Test Kitchen to paint the inside of the bundt pan with a melted butter and cocoa mixture. Not only was it fun to do, it yielded a cake that came out of it’s pan with no issues. I’m definitely going to be using that trick for other chocolate bundt cakes in the future.
Two Years Ago: Black and Tan Brownies and Cherry M&M Chocolate Chip Oatmeal Cookies
Three Years Ago: Colorful Cumin Quinoa Salad and Black Forest Cupcakes
Four Years Ago: Chinese Restaurant Almond Cookies
Tunnel of Fudge Cake
Tunnel of Fudge cake was made famous by the Pillsbury Bake-Off. This version from America's Test Kitchen is chocolatey and indulgent, as the name would suggest.
Yield: Serves 12-14
Ingredients:
For the Pan
1 Tbsp Dutch-processed cocoa powder
1 Tbsp unsalted butter, melted
For the Cake
1/2 cup boiling water
2 oz bittersweet chocolate, chopped
2 cups flour
3/4 cup Dutch-processed cocoa powder
2 cups powdered sugar
1 tsp salt
5 eggs, at room temperature
1 Tbsp vanilla
1 cup sugar
3/4 cup packed brown sugar
20 Tbsp unsalted butter, at room temperature
For the Glaze
3/4 cup heavy cream
1/4 cup light corn syrup
8 oz bittersweet chocolate, finely chopped
1/2 tsp vanilla
Directions:
For the Pan
Preheat the oven to 350 degF. In a small bowl, whisk together the cocoa powder and melted butter. Use a pastry brush to evenly coat the inside of a 12-cup bundt pan.
For the Cake
In a medium bowl, pour the boiling water over the chopped chocolate. Let stand for a minute, then whisk until smooth. In a medium bowl, combine the flour, cocoa powder, powdered sugar, and salt. Combine the eggs and vanilla in a liquid measuring cup and beat lightly.
In the bowl of an electric mixer, combine the granulated sugar, brown sugar, and butter. Beat on medium-high speed until light and fluffy, about 2 minutes. With the mixer on low speed, add in the egg mixture just until combined. Add the chocolate mixture and mix until incorporated. Blend in the dry ingredients until just combined.
Spread the batter into the prepared pan. Bake for about 45 minutes or until the edges of the cake begin to pull away from the pan.
Allow the cake to cool on a wire rack for 2 hours before inverting onto a cake platter. Allow to cool completely, about 2 more hours.
For the Glaze
Combine the cream, corn syrup, and chocolate in a small saucepan. Heat over medium heat, stirring frequently, until smooth. Blend in the vanilla. Set aside for about 30 minutes, until slightly thickened. Drizzle the glaze over the cake and let set for at least 10 minutes before slicing.
Recipe from Cook's Illustrated Entertaining, Holiday 2010
I am Jen the Beantown Baker. Engineer by day and baking maven by night. Hubby serves as my #1 fan and official taste tester. We got hitched back in 2006. Barefoot. In the sand. With the waves crashing behind us. It was one of the best decisions we’ve ever made. 
How cool! These look delicious!
This totally takes me back to childhood. We ALWAYS used fresh rhubarb from our backyard to make yummy breakfast treats!
I think I will have to make these for my parents next time they visit. They will LOVE them!
Those look amazing! I’m always on the lookout for new rhubarb recipes, the season for it is so short in Western Ma, that I tend to buy WAY too much and stick in the freezer..
I have never had rhubarb before, but these look great!
They’re so pretty – I love family recipes!
I never know what to do with Rhubard, but these looks awesome!
divine. i want one. right now. pretty please?? 🙂
I love your recipes, lactose free and awesome, I will def. have to try this. Ps. we should team up and do something lactose free together in solidarity!
Thanks everyone – seriously if you have rhubarb hanging around. Make these. You won’t regret it.
I’m a little lost. The ingredients list mentions 5 c. rhubarb (and you break it into 3 c. for the filling and 2 c. for the sauce) but I don’t see in the step-by-step instructions when/where/how the 2 c. of rhubarb are used. Please help!
Thanks!
alexandjess – thanks for catching my mistake. I added the instructions about the sauce into the post, but you make the sauce by boiling 2 cups cut rhubarb, 1 cup sugar, 1 1/3 cups water. The rhubarb for the sauce can be cut in large chunks because it all falls apart anyways.
Your sisters made the rhubarb rolls and stuffed dates yesterday for our Memorial Day cookout. They were delicious!!!! Can’t wait to have another piece tonight for desert. I have a new recipe for potato salad that is delish….let me know if you want me to pass on.
i made these tonight and they went awry for a series of reasons that were my fault and won’t go all into…. one thing i did though was use half rhubarb and half strawberries, which sounded delish but i didn’t cut the sugar enough and i think that also made things more watery. my question though, is whether by ‘shortening’ you specifically mean something like crisco or whether you just mean butter or margarine or anything like that. i used butter and didn’t see how i could get away with a little ‘stirring’ before rolling. i tried to cut it in with a pastry blender, but in the end maybe that was too much action for the dough as it seemed a little gummy after cooking….
i’d appreciate any advice!
natasha – I use Crisco for the dough. I think that’s what my dad always uses as well. Hopefully that is what caused the gumminess. Sorry they didn’t turn out for you.
My family has been making these for years. I have used butter or margarine to cut into the flour mixture for the dough and have never had a problem. I always roll my dough out into a rectangle and when I cut the rolls they NEVER look as neat as the ones you have pictured! I have added strawberries but only in the sauce. My mom liked to add red food coloring to make it look more rosy. We bake for 20 minutes before pouring on the sauce and then another 20 minutes. I have to make it every spring in honor of my mom.
my grandma recipe calls thesr soringtime rollypoly, and can ad what ever frozen berries you have , frozen is the least messy
sorry thats springtime rollypolly