Coffee and Walnut Cake
Coffee and Walnut Cake is a classic British dessert combining rich instant coffee aroma with crunchy chopped walnuts in a buttery sponge. The Thermomix grinds the walnuts, creams butter and sugar evenly, and whisks the coffee buttercream into a silky frosting. Perfect with afternoon tea, this cake delivers café-quality results in your own kitchen.
About this recipe
Coffee and Walnut Cake Thermomix TM7 recipes bring a true British bakery classic straight into your kitchen with minimal effort. This all-in-one kitchen machine transforms the traditional preparation: the TM7 grinds instant coffee and walnuts to release their full aroma, creams the unsalted butter with golden caster sugar into a pale fluffy base, and blends the buttercream frosting of icing sugar and butter into a lump-free, silky finish. The sponge itself stays moist and tender thanks to even mixing of the self raising flour, baking powder and eggs, giving a consistent crumb that hand-mixing rarely achieves. This cake is the ideal dessert for afternoon tea, birthdays, coffee mornings or a festive weekend bake, pairing beautifully with a strong espresso or a pot of tea. Freshly ground coffee delivers a far deeper flavour than pre-ground powder, and the chopped walnut pieces add a satisfying crunch against the smooth coffee buttercream. Whether you are an experienced baker or trying this recipe for the first time, the TM7 handles every step in a single bowl, meaning less washing up and more time to enjoy a generous slice with family and friends.
Preparation tips
- Tip 1: For an extra intense coffee flavour, dissolve the instant coffee granules in a small amount of hot water and let it cool completely before adding to the butter and sugar mixture, ensuring the sponge stays light.
- Tip 2: Reserve a handful of the chopped walnuts and press them onto the top of the frosted cake for a professional bakery-style finish, or sprinkle them around the edges for extra crunch in every slice.
- Tip 3: Store the cake in an airtight container and it will stay moist for several days; the coffee flavour actually deepens overnight, making it an excellent make-ahead dessert for parties.
Recipe variations
- Variation 1: Make a lactose-free version by replacing the unsalted butter in both the sponge and the coffee buttercream with a good-quality plant-based block butter; the walnuts and coffee flavour remain fully intact.
- Variation 2: For a festive Christmas version, add a pinch of cinnamon and a splash of coffee liqueur to the buttercream, decorate with whole candied walnuts, and dust lightly with icing sugar for a snowy finish.
Thermomix TM7 Benefits
- Grinding mastery - The TM7 grinds instant coffee granules into a fine aromatic powder that disperses evenly through the sponge. [Grinding]
- Weighing accuracy - The integrated scale of the Thermomix weighs golden caster sugar and flour directly into the bowl, gram precise. [Built-in scale]
- Silky frosting - The Thermomix blends icing sugar and butter into a velvety coffee buttercream without a single lump in seconds. [Mixing]
- Chopping control - The TM7 chops walnuts to a uniform crunch in seconds, keeping pieces distinct rather than oily meal. [Chopping]
- Whipping ease - The Thermomix whips the eggs and butter mixture into a pale airy cream, giving the cake its tender crumb. [Whipping]
Ingredients
- unsalted butter
- golden caster sugar
- large eggs
- self-raising flour
- baking powder
- instant coffee
- walnuts, chopped
- icing sugar
- unsalted butter
- instant coffee