Description
This towering chocolate chip layer 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. Watch the video tutorial for a complete walk-through of the recipe and demonstration of how to do the ganache drip topping. For other size cakes using this recipe, see Notes below.
Ingredients
Cake
- 2 and 1/2 cups (285g) cake flour (spooned & leveled)
- 2 teaspoons baking powder
- 1/2 teaspoon baking soda
- 1 teaspoon salt
- 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
- 1 and 3/4 cups (350g) granulated sugar
- 5 large egg whites, at room temperature
- 1/2 cup (120g) sour cream, at room temperature
- 1 Tablespoon pure vanilla extract (yes, Tbsp!)
- 1 cup (240ml) whole milk, at room temperature
- 1 and 1/4 cups (225g) mini chocolate chips tossed in 1 Tablespoon cake flour
Whipped Chocolate Chip Buttercream
- 1 and 1/2 cups (340g) unsalted butter, softened to room temperature
- 5 and 1/2 cups (650g) confectioners’ sugar
- 1/3 cup (80ml) heavy cream (can be cold or room temperature)
- 1 and 1/2 teaspoons pure vanilla extract
- 1/8 teaspoon salt
- 1 cup (180g) mini chocolate chips
Chocolate Ganache
- 6 ounces (170g) semi-sweet chocolate, finely chopped
- 3/4 cup (6 ounces or 170–180g/ml) heavy cream
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. (If it’s helpful, see this parchment paper rounds for cakes video & post.)
- Make the cake: 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 3 minutes. Scrape down the sides of the bowl with a silicone spatula as needed. (Here’s a helpful tutorial if you need guidance on how to cream butter and sugar.) 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.
- Make the buttercream: (Note that if you want to pipe plain buttercream on top of the cake like in the photos and video, set around 3/4 cup (about 180g) aside before adding the chocolate chips.) 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.
- Assemble and decorate: 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.
- Make the chocolate ganache: 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.
- Chocolate ganache drip: 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. See video tutorial below as a visual. 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.
Notes
- Make Ahead & Freezing Instructions: The cake layers can be baked, cooled, and covered tightly at room temperature overnight. Likewise, the frosting can be prepared and then covered and refrigerated overnight. Bring the frosting to room temperature when ready to assemble the following day. Frosted cake can be frozen up to 2 months if you have room in the freezer. Thaw overnight in the refrigerator and bring to room temperature before serving.
- Special Tools (affiliate links): 8-inch Cake Pans or 6-inch Cake Pans or 9-inch Cake Pans | Glass Mixing Bowls | Whisk | Electric Mixer (Handheld or Stand) | Silicone Spatula | Cooling Rack | Offset Spatula | Straight Icing Spatula | Glass Liquid Measuring Cup | Small Saucepan | Squeeze Bottle | Round Cake Carrier (for storage)
- Cake Flour: If you can’t find cake flour, here is a DIY homemade cake flour substitute you can use instead.
- Carton Egg Whites: You can use carton egg whites. The carton should give measurements for substituting for fresh egg whites.
- Milk, Sour Cream, Substituting Buttermilk: Whole milk and sour cream are strongly recommended for the best taste and texture. A full-fat plain yogurt would work instead, though the cake may not be as light. Same goes for a lower-fat milk. If you want to use buttermilk, the best way to do so is to have it replace both the sour cream AND milk in this recipe. Use 1 and 1/2 cups of buttermilk, then leave out the sour cream and whole milk.
- If Using Regular Chocolate Chips: If you use regular chocolate chips instead of mini chocolate chips, they are more likely to sink in the cake layers, even after tossing in flour. I have better success using mini chocolate chips.
- Chocolate: Ganache will only set if the correct chocolate is used. You can use high-quality chocolate chips if needed (I prefer Ghirardelli or Guittard semi-sweet chocolate chips), but I recommend using chocolate baking bars, in either semi-sweet or bittersweet. You can find them right next to the chocolate chips in the baking aisle. They are usually sold in 4-ounce (113g) bars. I like Baker’s or Ghirardelli brands.
- 3-Layer 6-Inch Cake Instructions: You can use 6-inch cake pans and make this chocolate chip layer cake as a 6-inch 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.
- 2-Layer 9-Inch Cake Instructions: Make the cake batter as instructed above, 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 Quarter Sheet Cake Instructions: Make the cake batter as instructed above, but 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 ingredient amounts from this vanilla sheet cake recipe, and add 3/4 cup (135g) mini chocolate chips. For the ganache topping, you can keep the amount as is for a thicker layer, or decrease 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.
- Chocolate Frosting Alternative: This cake also tastes amazing with chocolate frosting instead. Follow the frosting recipe from my triple chocolate layer cake recipe. It’s enough for today’s 3-layer cake. Feel free to fold in chocolate chips!