clock clock iconcutlery cutlery iconflag flag iconfolder folder iconinstagram instagram iconpinterest pinterest iconfacebook facebook iconprint print iconsquares squares icon
Chocolate Wacky Cake

Chocolate Wacky Cake

  • Author: Cherie L.
  • Prep Time: 15 minutes
  • Cook Time: 30 minutes
  • Total Time: 45 minutes
  • Yield: 8" x 8" Cake Pan 1x



  • 188 g plain flour
  • 200 g caster sugar
  • 28 g unsweetened cocoa powder
  • 1 tsp baking soda
  • 3/4 tsp salt
  • 1 tbsp distilled white vinegar
  • 1 tsp vanilla extract
  • 80 g oil
  • 240 ml water (room temperature)


  • 112 g unsalted butter (softened)
  • 30 g unsweetened cocoa powder
  • 3/42 tsp milk (room temperature)
  • 135165 g icing sugar
  • Pinch of salt
  • 1 tsp vanilla extract



  1. Preheat oven to 175C. Grease and line 8″ x 8″ cake pan.
  2. Sift all dry ingredients into a large mixing bowl or tray. If you do not have a sieve, simply whisk all dry ingredients together till fairly well combined.
  3. Make 3 holes in the dry ingredients.
  4. Place vinegar, oil, vanilla extract respectively in each of the holes.
  5. Pour water over the ingredients and whisk well, using a whisk or fork. You should have a fairly smooth and liquid batter.
  6. Pour batter into prepared cake pan. Bake in preheated oven at 175C for 26-32 mins, or until a skewer inserted into the middle comes out clean.
  7. Let cake cool completely on wire rack.


  1. Sift and mix cocoa powder, icing sugar and pinch of salt in mixing bowl.
  2. Place softened butter into the bowl and beat well.
  3. Once mixture is smooth, add in milk and vanilla. You can adjust consistency by adding more milk (so it is softer). Add 1/2 tsp one at a time. Beat till buttercream lighten slightly in color and looks fluffier.
  4. Once buttercream is ready, spread onto completely cooled cake. Decorate as you wish.


You can let frosted cake chill briefly in the fridge for 15-20 mins for the buttercream to set, so you can cut nicely.

Use 135g icing sugar first. This buttercream is sweeter. If you prefer a much more sweeter taste, add more icing sugar bit by bit after you tasted it.

Omit cocoa powder if you’d like to make a vanilla buttercream instead.

  • Category: Cakes, Dessert, Eggless, Dairy Free
  • Method: Mixing
  • Cuisine: American