1cupbuttermilkor 1 cup milk with 1Tb vinegar, set aside to sour for 5 mins
1/2cupvegetable oilI like to use grapeseed oil
1tspvanilla extract
1cuphot brewed coffeeinstant is also fine to use
Frosting
1/3cupsalted butterroom temp
1/3cupmilk
2 1/3cupicing sugarpowdered sugar
2/3cupcocoa powderdutch processed if possible
Instructions
Preheat oven to 175C. Grease and line the base of an 8in cake tin.
For the CAKE, in a large mixing bowl, sift the first 5 (dry) ingredients together. Make a well in the centre.
Add in the eggs, buttermilk, oil and vanilla extract. Give a quick whisk to combine.
Add the hot coffee and whisk the batter until smooth (about 1 minute). The batter will be quite runny.
Pour the thin batter into the lined cake tin and bake for 45-55mins. You know it's done when a skewer (or knife) is inserted into the centre of the cake and comes out clean.
Let cake cool in the pan for 10mins on the counter before transferring to a wire rack.
Meanwhile for the FROSTING, whip the butter until light and fluffy.
While that's whipping, sift together the cocoa powder and icing sugar.
Add in 1/3 of the powder along with 1/2 of the milk into the bowl with the butter and combine gently with a spatula so the powdered sugar doesn’t fly everywhere when you whip it!
Whip until smooth and fluffy. Repeat, ending with the last portion of cocoa/icing sugar scraping down the sides as you go.