This milk chocolate chip cake is a fluffy white cake with mini chocolate chips, a milk chocolate ganache filling, and a whipped milk chocolate frosting. Creamy, decadent, and seriously delicious!
For the cake:
¾ cup egg whites (I use ones directly from the carton), at room temp
1 cup (230 gm) unsalted butter, at room temp
1–1/2 cups (300 gm) sugar
3 cups plus one tablespoon (400 gm) cake flour
2 teaspoons baking powder
½ teaspoon salt
1 cup (240 gm) milk
1 teaspoon vanilla
1 cup mini chocolate chips
For the ganache:
4 ounces chopped milk chocolate
2 ounces heavy cream
pinch of salt
For the frosting:
6 ounces milk chocolate, gently melted
1–1/2 cups (345 gm) unsalted butter, at room temperature
4 cups (460 gm) powdered sugar
¼ teaspoon salt
1 teaspoon vanilla extract
5 tablespoons of heavy cream or milk
To prepare the cake layers:
Preheat the oven to 350 degrees and prep your pans by greasing them and lining the bottoms with rounds of parchment paper. You can bake this recipe in three 6” pans or two 8 or 9” pans.
In the clean bowl of a stand mixer or a large mixing bowl, beat the egg whites on medium-high speed until stiff peaks form. Set aside in another bowl while you continue prepping the cake.
In the same stand mixer bowl you whipped the egg whites in, cream the butter and sugar for 2 minutes. Scrape the sides of the bowl. Combine 3 cups of the flour, baking powder, and salt and add half of this mixture to the butter mixture. Stir on low to almost combine and then add half of the milk and the vanilla. Stir to combine and then add the remaining half of the dry ingredients followed by the remaining half of the milk. Once almost combined add the mini chocolate chips and fold in. Use a rubber spatula to gently fold in the egg whites being careful not to overwork the batter. Divide equally among your pans and bake in the oven- about 28 minutes for three 6” pans of 25 minutes for two 8” pans. Bake until a toothpick inserted comes out clean, but be careful to not overbake! The tops will be golden and set when the cakes are done. Set aside to cool completely before assembling the cake.
To prepare the ganache:
Place the milk chocolate in a small mixing bowl and gently heat the cream in the microwave or on the stove until just barely bubbling. Pour the cream over the chocolate and cover the bowl with plastic wrap for about 3 minutes. Remove the plastic wrap after 3 minutes and use a whisk to combine until smooth. Set aside to cool while you make your frosting.
To prepare the frosting:
In a large bowl or the bowl of a stand mixer, cream the butter on medium speed for two minutes. Scrape the sides of the bowl and add the powdered sugar, beating on medium for another minute and a half. Add the salt, vanilla, and cream and beat to combine for 30 seconds. Fold in the melted (but not hot!) chocolate quickly until incorporated. If your chocolate was too hot and the mixture seems too thin and loose, you can place it in the fridge to firm up a bit or add a smidge of powdered sugar.
To assemble the cake:
Use a serrated knife to cut the domes off the tops of the cake. Tops of the cake should be flat prior to assembling. Place a bit of frosting on you plate or cake board that you wish to frost your cake on and set your first layer on top. Use an offset spatula to spread a hefty dollop of frosting on top of the first layer. Fill a piping bag or a quart sized plastic bag with some of the frosting and pipe a circle border/dam around the perimeter of the frosting cake top. Make sure it is about ½” tall so that your ganache will stay inside the dam. Spread just enough ganache inside the dam, but not too much so that the ganache overflows the top of the dam. Place the next layer on top and repeat this process until your cake layers have been used up. Use the remaining frosting to frost your cake as desired. Cake is should be stored covered tightly with plastic wrap and is best eaten within 2 days of making.
You can use fresh egg whites here if you’d like!
If you opt to bake 6” cake layers, take care to not overbake the cake. If you’re worried about the cake being dry, simply cut the domes off the tops of the cakes and use a basting brush to “paint” milk on top of the flat cake. The milk won’t change the flavor of the cake but will help it to moisten up again.