This towering chocolate chip cake combines a soft vanilla cake crumb and sweet whipped vanilla buttercream with oodles of mini chocolate chips. For a finishing touch that elevates this cake to showstopper status, top it with a chocolate ganache drip..
Q: How do you improve on the perfect white cake? A: Add chocolate chips! Because after all, why let the chocolate chip cookies have all the fun? Chocolate chips are great in cakes, too! (And both can be true at once: have you made this chocolate chip cookie layer cake before?)
In today’s version, we’re adding chocolate chips, and portioning the batter between 3 8-inch round cake pans. You can, of course, stick with 2 9-inch round cake pans like the original version. But no matter what you do, don’t skimp on the fluffy buttercream and decadent chocolate ganache drip!
Key Ingredients for Your Chocolate Chip Cake
Start by Making the Chocolate Chip Cake Layers
The cake batter follows a simple, familiar process. Whisk the dry ingredients together, then work on the wet ingredients. In a separate bowl, use a mixer to cream the butter and sugar together. Beat in egg whites, then the sour cream and vanilla. Pour in the dry ingredients and then with the mixer running, slowly add the milk. Finally, fold in the chocolate chips by hand or with the mixer on low speed.
Expect a creamy, slightly thick batter, and then divide between your cake pans:
Use Parchment Paper Rounds for Cakes
Lining cake pans with parchment rounds is the trick I use every single time I bake a round cake, whether I’m making a 1-layer sprinkle cake, a 9-layer Smith Island cake, or today’s recipe. Store-bought pre-cut parchment rounds are convenient, but it’s really easy to just make them yourself. You can cut the exact pan size you need, whether you’re making a 6-inch cake, an 8-inch cake, or a 9-inch cake. If you don’t make a lot of round cakes, just cut them as you need them. If you bake a lot, cut many at a time and store them with your baking pans, ready for the next time you bake.
Very lightly grease the cake pan with butter or nonstick spray. Place the parchment paper round inside, and then grease the parchment, too. Yes, you grease the pan and then also grease the parchment. This creates an ultra-nonstick environment for your cake. The cake won’t stick to the pan, and the parchment round won’t stick to the cake. For more tips on this method, see Parchment Paper Rounds for Cakes.
Once the cakes have baked and cooled, trim the tops using a cake leveler or a large serrated knife to create an even surface. A flat top ensures a sturdier and more stable layered cake. Check out this detailed how to assemble and decorate a layer cake post for helpful tips!
Whipped Chocolate Chip Buttercream
To fill and assemble today’s towering cake, I took the whipped vanilla buttercream from my vanilla sheet cake recipe and scaled it up to coat this 3-layer 8-inch chocolate chip cake. And since this is a chocolate chip cake, I couldn’t resist folding chocolate chips into it. Taste testers (and there were dozens after making about 6 of these!!!) didn’t seem to mind the extra chocolate. 😉
It’s whipped, fluffy, and positively loaded with chocolate chips:
. You wouldn’t want to try to pipe the chocolate chip buttercream because the chips could clog the piping tip.
Assemble the cooled cake layers with the frosting. I use about 1 cup of frosting between each layer—just eyeball it.
Absolutely No Need for a Crumb Coat
In most of my layer cake recipes, I recommend applying a crumb coat: a thin layer of frosting on the exterior of the cake that locks in any loose crumbs and helps stabilize the layers. However, for this chocolate chip layer cake, we’re skipping that step. Because of the lumpy chocolate chips, it would be hard to spread the frosting thin enough to make a crumb coat. The other thing we’re doing differently today is not running a bench scraper around the sides of this cake to smooth out the frosting, because it would only drag the chocolate chips around. Instead, I use a large flat icing spatula to apply the chocolate chip buttercream on the sides.
2-Ingredient Chocolate Ganache
Chocolate Ganache Drip Cake Decoration How-to
Refrigerate the cake for at least 20 minutes before adding the chocolate drip. You want the frosting to be fairly cold before you top it with the warm chocolate ganache, so the chocolate begins to set as it drips down the sides of the cake.
Make the chocolate ganache in a glass liquid measuring cup with a pour spout, to make it easy to transfer it into the squeeze bottle.
Go around the perimeter of the top of the cake in a zigzag motion, squeezing the bottle so the chocolate comes out and drips down the sides of the cake. Work quickly, because as the ganache cools, it begins to thicken, and we don’t want that happening in the squeeze bottle. After you’ve gone all the way around the edge, squeeze the remaining chocolate ganache on top of the cake, and use an offset spatula to smooth it out.
Refrigerate the cake again for at least 20 minutes to set the ganache before slicing.
I reserved some buttercream to pipe on top of the cake as an optional garnish (before adding the chocolate chips). I used a Wilton 1M piping tip. You can absolutely do that, or you can top with more chocolate chips, fresh berries, or crumble up the cake scraps you leveled off the top of the cake layers.
Make This as a 6-Inch Cake, 9-Inch Cake, or a Sheet Cake
This is a tall, rich cake that serves a lot of people, and I know that many bakers don’t want to make such a large cake. Instead, you can use 6-inch cake pans and make this chocolate chip layer cake as a 6-inch cake; or you can make a 9-inch 2-layer cake, or a 9×13-inch quarter sheet cake. Here are instructions for each:
- 6-Inch 3-Layer Cake: Follow all the same directions for the 6-inch vanilla cake recipe in the recipe card here, and add 3/4 cup (135g) mini chocolate chips (still tossed in a Tablespoon of flour) to the batter, and 3/4 cup mini chocolate chips to the frosting. For the ganache drip topping, decrease the amounts to 4 ounces (113g) chopped chocolate and 1/2 cup (120g/ml) heavy cream.
- 9-Inch 2-Layer Cake: Make the cake batter as instructed below, and divide between 2 greased and lined 9-inch round cake pans. Extend the bake time to 26–28 minutes. Keep the frosting and ganache amounts the same.
- 9×13-inch Sheet Cake: Make the cake batter as instructed below, and pour/spread it in a greased metal or glass 9×13-inch baking pan. Bake for 34–36 minutes, until a toothpick inserted in the center of the cake comes out clean. For the frosting, use the whipped vanilla buttercream amounts from this vanilla sheet cake recipe, and add 3/4 cup (135g) mini chocolate chips. For the ganache topping, you can make it as written below, or decrease the amounts to 4 ounces (113g) chopped chocolate and 1/2 cup (120g/ml) heavy cream for a thinner layer. Follow the same instructions for the ganache, including refrigerating the cake before and after topping, but instead of transferring ganache to a squeeze bottle, simply pour and spread it evenly over the frosting.
Here’s the sheet cake version:
Chocolate Chip Cake with Ganache Drip Recipe
Ingredients You’ll Need
Instructions
- Preheat oven to 350°F (177°C). Grease three 8-inch round cake pans, line with parchment paper rounds, then grease the parchment paper. Parchment paper helps the cakes seamlessly release from the pans..)
- Whisk the cake flour, baking powder, baking soda, and salt together. Set aside.
- Using a handheld or stand mixer fitted with a paddle attachment, beat the butter and sugar together on high speed until combined and creamy, about 2 to 3 minutes. Scrape down the sides of the bowl with a silicone spatula as needed. Add the egg whites. Beat on high speed until combined, about 2 minutes. Then beat in the sour cream and vanilla extract, again on high speed, until the mixture comes together. Scrape down the sides as needed. Add the dry ingredients and turn the mixer on low speed. With the mixer running on low, slowly pour in the milk until combined. Do not overmix. You may need to whisk it all by hand to make sure there are no lumps or dry pockets at the bottom of the bowl. The batter will be slightly thick. Fold in the mini chocolate chips.
- Pour batter evenly into cake pans. Weigh them to ensure accuracy, if desired. Bake for 24–26 minutes or until the cakes are baked through. To test for doneness, insert a toothpick into the center of the cake. If it comes out clean, it’s done. Or you can lightly poke the top of the cake with your finger. If it bounces back, it’s done.
- Allow cakes to cool in the pans set on a cooling rack for 1 hour, then remove them from the pans and let the cakes finish cooling directly on the rack. The cakes must be completely cool before frosting and assembling.
- .) In a large bowl using a handheld mixer or stand mixer fitted with a paddle attachment, beat the butter on medium to medium-high speed until smooth and creamy, about 2 minutes. Add confectioners’ sugar, heavy cream, vanilla extract, and salt. Start the mixer on low speed, then gradually increase to high speed and beat until whipped and fluffy, about 4 minutes. Fold in the mini chocolate chips, either by hand with a spatula, or you can beat them in on low speed until they’re evenly dispersed throughout the frosting.
- Using a large serrated knife, slice a thin layer off the tops of the cakes to create a flat surface. Discard the scraps, or you can save them to crumble on top of the finished cake. Place 1 cake layer on your cake stand, cake turntable, or serving plate. Evenly cover the top with about 1 cup of frosting. Top with 2nd cake layer, upside down, and evenly cover the top with another 1 cup of frosting. Top with the third cake layer, either right side up or upside down. Spread the remaining frosting all over the top and sides. I use and recommend a large, straight icing spatula to apply the frosting.
- Refrigerate the cake for at least 20 minutes, or up to 8 hours. The frosting must be cold when you add the chocolate drip on top.
- Place chopped chocolate in a medium heat-proof bowl with a pour spout (I use a 2-cup glass liquid measuring cup). Heat the cream in a small saucepan over medium heat until it begins to gently simmer. (Do not let it come to a rapid boil—that’s too hot!) Pour over chocolate, then let it sit for 2–3 minutes to gently soften the chocolate. With a metal spoon or small rubber spatula, very slowly stir until chocolate has melted and mixture is smooth. The finer you chopped the chocolate, the quicker it will melt with the cream. If it’s not melting, do not microwave it. If needed, see Troubleshooting Chocolate Ganache. Once ganache mixture is smooth, transfer it into a squeeze bottle.
- Remove the cake from the refrigerator. Working in a zigzag motion, gently squeeze the warm ganache around the edge of the cake, turning the cake as you go.. The ganache should drip down the sides and set as it does. When you’ve gone around the whole cake, squeeze remaining ganache on top of the cake, and smooth it into an even layer with an offset spatula. Feel free to garnish with fresh berries, chocolate chips, or leftover cake crumbles from leveling the tops of the cakes. Chill, uncovered, for at least 20 minutes, or up to 6 hours before slicing and serving. Once the ganache has chilled, if you set aside buttercream in step 6, you can pipe it on. I used Wilton 1M piping tip.
- Cake can be served at room temperature or chilled. I prefer it at room temperature. Cover leftover cake tightly and store in the refrigerator for up to 5 days. I like using a cake carrier for storing and transporting.
Frequently Asked Questions
If the chocolate ganache thickens in the squeeze bottle before you've finished using it all, place the bottle in large bowl/container filled with very warm water. Let it sit for 5 to 10 minutes until it thins out again.
Yes. If you don't have a squeeze bottle, you can use a piping bag with a small round tip, or a zipped-top plastic bag with a corner snipped off. You could even just use a spoon, but it will take a bit longer.
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