1. Make a single shot of espresso (we'd recommend using one of
Coffee Capsules but any coffee will work for this recipe). Set your
espresso to one side and allow to cool.
2. In a separate bowl, use the Dualit Hand Mixer
with Flat Beater Attachments to mix the flour, baking powder,
sugar, oil, cocoa powder, milk and egg together. If you want to add
finely chopped walnuts to your cake batter for a little crunch,
also add these now.
3. Remove one teaspoon of the cooled coffee and set aside to use
for the frosting, before adding the remaining cooled coffee to the
4. Evenly spoon the mixture into two Dualit
5. Place one mug into the microwave for 45 seconds, before
inserting a metal skewer into the centre of your mug cake to check
if it is cooked. If the skewer comes out clean, your mug cake is
ready, if it does not come out clean, place it back into the
microwave for a further 15 seconds.
6. Once cooked through, remove the mug from the microwave and
repeat step 5 for the second mug.
7. Make the frosting by adding the butter, icing sugar and
teaspoon of coffee into a small bowl. Mix until a smooth paste is
formed. If your mix is too loose, add more icing sugar.
8. While the cakes are still warm, use a spoon to cover the top
of each with frosting before sprinkling on an even amount of
9. To make your coffee and walnut cake look like a cappuccino,
cover with swirls of whipped or squirty cream and dust with cocoa
- The recipe is based on using an 800w Microwave Oven. If your
microwave has a higher power, cook your mug cake in 15 second
intervals and check as cooking may take less time. Alternatively,
if your microwave has a lower power, cook for 45 seconds before
checking, then continue to cook in 15 second intervals. Cooking may
take longer for lower power microwaves.
- Marscapone or cream cheese can be used for the topping in place
of the butter. Simply use the same amount as the quantity of butter
stated in this recipe and follow the same steps.
- Do not be tempted to overfill your mug with batter as the cake
will rise in the cup.
- The cake will drop slightly when opening the door after each
cooking interval, but will rise again when the microwave is
switched back on. Do not worry, this is normal and will not alter
the taste or baking of the cake.