Vegan Chocolate Cake at home that's absolutely butter-free and egg-free and yet tastes divine. vegan chocolate cake recipe that's extremely simple and easy to put together. This cake isn't too sweet on its own, so the dark chocolate glaze over it, sweetened with icing sugar hits just the right sweet notes. Ingredients: For the cake: 1 cup warm water (lukewarm, not boiling) 1/2 cup unsweetened cocoa powder (extra for dusting pan) 1 1/2 cups (180 grams) all-purpose flour 1 cup caster sugar (160 gr