1. Bake the Chocolate Cake
Start by preheating your oven to 375°F. Grease two 8- or 9-inch round cake pans and line the bottoms with parchment paper.
In a large bowl, whisk together the flour, sugar, cocoa powder, baking powder, baking soda, and salt.
In another bowl, whisk the eggs, buttermilk, oil, and vanilla until well combined. Gradually add the wet mixture to the dry ingredients, mixing only until everything comes together.
Slowly stir in the boiling water. The batter will be surprisingly thin, but don’t worry—that’s normal.
Divide the batter evenly between the prepared pans. Bake for approximately 25–35 minutes, or until a toothpick inserted into the center comes out clean.
Let the cakes cool in their pans for about 5 minutes, then carefully transfer them to wire racks. Allow them to cool completely before decorating.
2. Prepare the Coconut-Pecan Filling
While the cake layers cool, prepare the signature filling.
Place the evaporated milk, brown sugar, granulated sugar, butter, and egg yolks in a medium saucepan. Cook over medium heat, stirring constantly, until the mixture reaches a gentle boil and begins to thicken.
Keep stirring throughout this process so the egg yolks don’t cook unevenly.
Once the custard has thickened, remove the pan from the heat. Stir in the vanilla, coconut, and chopped pecans.
Let the filling cool completely. It will become thicker as it cools, making it much easier to spread between the cake layers.
3. Make the Chocolate Buttercream
Melt the butter, then stir in the cocoa powder until smooth.
Gradually beat in the powdered sugar, alternating with small amounts of evaporated milk. Continue mixing until the frosting becomes smooth and creamy.
If the buttercream is too thick, add a little more milk. If it’s too soft, add additional powdered sugar.
Finish with the vanilla extract.
4. Assemble the Cake
Place one completely cooled cake layer on your serving plate or cake stand.
Spread a layer of chocolate buttercream over the top, followed by about half of the cooled coconut-pecan filling. Leave a small border around the edge so the filling doesn’t spill over the sides.
Place the second cake layer on top.
Cover the sides and the outer portion of the top with the remaining chocolate buttercream. Spoon the rest of the coconut-pecan mixture into the center of the top for that classic German Chocolate Cake appearance.
Helpful Tips for the Best Results
- Use Room-Temperature Ingredients: Let the eggs and buttermilk come to room temperature before mixing. This helps the ingredients blend more evenly.
- Line Your Cake Pans: Parchment paper makes removing these moist cake layers much easier.
- Don’t Overmix: Once the wet and dry ingredients are combined, stop mixing. Overworking the batter can make the finished cake heavier.
- Cool Everything Completely: Never frost a warm cake. The buttercream can melt, and the coconut-pecan filling may slide out between the layers.
- Let the Filling Cool: The custard thickens considerably as it reaches room temperature, so give it enough time before assembling the cake.
Storage and Make-Ahead Tips
Because the coconut-pecan filling is custard-based, refrigerate the finished cake if you plan to keep it for more than a day. Cover the cake well to prevent it from drying out or absorbing refrigerator odors.
For the best texture, allow refrigerated slices to sit at room temperature for about 20 minutes before serving.
The cake layers can also be prepared ahead of time. Once completely cooled, wrap them tightly in plastic wrap followed by aluminum foil and freeze for up to a month. Thaw them overnight in the refrigerator before assembling the cake.
Frequently Asked Questions
Can I bake this cake in a 9x13-inch pan?
Yes. Pour the batter into a greased 9x13-inch baking pan and bake for approximately 35–40 minutes, checking for doneness with a toothpick. Once cooled, spread the chocolate buttercream over the cake and finish with the coconut-pecan topping.
Why is my coconut-pecan filling too runny?
The filling may not have cooked long enough, or it may simply need more time to cool. The custard thickens as it cools, so make sure it has reached a properly thickened consistency before removing it from the heat and allow it to cool completely before spreading.
Can I make the cake ahead of time?
Absolutely. The cake layers can be baked and frozen ahead of time, making assembly much easier when you’re ready to serve. The finished cake can also be refrigerated until needed.
This homemade German Chocolate Cake is the perfect choice when you want a dessert that looks impressive and tastes even better. The combination of moist chocolate cake, creamy coconut-pecan filling, and silky chocolate buttercream makes every layer worth savoring.
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