Preheat your oven to 150°C fan. Line an 8-inch round tin with baking paper and spray with oil.
Add the eggs and sugar to the bowl of your stand mixer or use an electric beater to beat until light and foamy. This will take about five minutes.
While the mixer runs on a low speed, slowly pour in the melted chocolate and oil. Scrape down the sides of the bowl and then add flour, cocoa, bicarbonate of soda and salt to the mixture.
Pour in the water. Mix until combined, scrape down the sides of the bowl and continue mixing to ensure there are no lumps in your batter.
Pour the batter into your tin. Bake for 60-70 minutes or until a skewer inserted into the middle of the cake comes out clean. Remove from the oven and leave to cool completely in the tin. (I usually do this the night before)
Mix together the icing sugar and double cream and pour 2/3 of it into a bowl and set this aside. Whip the smaller amount to soft peaks.
Carefully slice the cake in two. I like to use multiple fish slices/spatulas under the slice and move it at once. Get another pair of hands to help you if you can. Spread the bottom piece generously with raspberry jam. Arrange raspberries in one layer around the outside and fill the middle with the whipped cream.
Sandwich the cakes together.
Whip the remainder of the cream with the matcha until it’s thickened. Scoop this matcha whipped cream on top of the cake. Scatter over more raspberries, fresh mint and grated chocolate.
Serve and enjoy!