Mix the water, cocoa and coffee and leave to cool while you prepare the rest of the recipe.
Mix the softened butter with the oil, sugar and vanilla, then add the eggs, milk and vinegar.
Add the flour, baking powder and salt. Mix until you obtain a homogeneous mixture.
Pour into a 20cm diameter mold
Bake for 25 to 30 min at 160°
Leave to cool then divide into two circles.
Boil the cream, add the chocolate and mix to emulsify.
Then add the butter and mix
Leave to set at room temperature before garnishing and covering your cake.
