Coffee walnut cake is a two-layer cake with brewed coffee in the batter, chopped walnuts folded through, and a coffee buttercream spread over the top and sides. Bake the layers in 8-inch pans, let them cool completely, then frost and finish with a scatter of walnuts.
Ingredients for Coffee Walnut Cake:
For the Cake:
- 1 3/4 cups all-purpose flour
- 1 tsp baking powder
- 1/2 tsp baking soda
- 1/4 tsp salt
- 1/2 cup unsalted butter (softened)
- 3/4 cup granulated sugar
- 1/2 cup brown sugar
- 2 large eggs
- 1/2 cup brewed coffee (cooled)
- 1/3 cup whole milk
- 1 tsp vanilla extract
- 1/2 cup chopped walnuts
For the Coffee Buttercream Frosting:
- 1/2 cup unsalted butter (softened)
- 2 cups powdered sugar
- 2 tbsp brewed coffee (cooled)
- 1/2 tsp vanilla extract
- 1/4 cup chopped walnuts (for garnish)
Step-by-Step Recipe for Coffee Walnut Cake:
Step 1: Prepare the Batter
- Preheat your oven to 350°F (175°C). Grease and flour two 8-inch round cake pans.
- In a medium bowl, whisk together flour, baking powder, baking soda, and salt. Set aside.
- In a large bowl, cream together butter, granulated sugar, and brown sugar until light and fluffy.
- Add the eggs one at a time, mixing well after each addition. Stir in vanilla extract.
- Gradually mix in the dry ingredients, alternating with coffee and milk. Begin and end with the dry ingredients. Fold in the chopped walnuts.
Step 2: Bake the Cake
- Divide the batter evenly between the prepared pans and smooth the tops.
- Bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean.
- Let the cakes cool in the pans for 10 minutes, then transfer to a wire rack to cool completely.
Step 3: Prepare the Coffee Buttercream Frosting
- In a bowl, beat the butter until smooth and creamy.
- Gradually add the powdered sugar, mixing until fully incorporated.
- Add brewed coffee and vanilla extract, beating until the frosting is light and fluffy.
Step 4: Assemble the Cake
- Place one cake layer on a serving plate. Spread a generous amount of frosting on top.
- Place the second layer on top and frost the top and sides of the cake.
- Garnish with chopped walnuts for an elegant finish.
Nutritional Information for Coffee Walnut Cake
The following breakdown is for a single serving (1/12th of the cake):
- Calories: 350
- Protein: 4g
- Fat: 18g
- Saturated Fat: 10g
- Carbohydrates: 45g
- Sugars: 30g
- Fiber: 1g
- Sodium: 180mg
Tips for the Perfect Coffee Walnut Cake
- Use fresh coffee: Brewed coffee adds depth to the flavour, so ensure it’s fresh and strong.
- Toast the walnuts: Toasting enhances the flavour and crunch of the walnuts.
- Chill the frosting: If the frosting becomes too soft, chill it for 10 minutes before assembling the cake.
Happy baking!
Frequently Asked Questions
How do I fix coffee buttercream that is too soft?
Chill it for about 10 minutes before you assemble the cake. That firms it up enough to spread easily.
How can I tell when the cake layers are done?
Bake for 25 to 30 minutes, then push a toothpick into the centre of a layer. If it comes out clean, they are ready. Leave the layers in the pans for 10 minutes before moving them to a wire rack.
Is it worth toasting the walnuts?
Yes. Toasting brings out more flavour and crunch. Strong, freshly brewed coffee matters too, since it gives the cake its depth.
