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Ultimate Easy Chocolate Traybake: Quick One-Pan Cake with Fudgy Icing

This easy chocolate traybake recipe delivers a moist chocolate sponge cake baked in one pan, topped with decadent fudgy icing for a crowd-pleasing dessert. Perfect for parties, bake sales, or everyday treats, it requires minimal effort with ingredients mixed in one bowl.
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Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 12 servings
Calories: 320
Ingredients Method Notes

Ingredients
  

Ingredients
  • 200g self-raising flour
  • 200g caster sugar
  • 50g cocoa powder
  • 200g butter, softened
  • 4 large eggs
  • 1 tsp vanilla extract
  • 100ml milk
  • 1 tsp baking powder
  • 100g butter
  • 200g icing sugar
  • 50g cocoa powder
  • 2 tbsp milk
  • Sprinkles or chocolate chips for decoration (optional)

Method
 

Instructions
  1. Preheat oven to 180°C/160°C fan/gas mark 4. Grease and line a 9x13 inch baking tray with parchment paper.
  2. In a large mixing bowl, sift together the flour, cocoa powder, and baking powder.
  3. In a separate bowl, cream together softened butter and caster sugar until light and fluffy (3-4 minutes).
  4. Beat in eggs one at a time, then add vanilla extract and mix until combined.
  5. Gradually add dry ingredients to wet mixture, alternating with milk, mixing until just combined.
  6. Pour batter into prepared tray, smooth the top, and bake for 25-30 minutes until skewer comes out clean.
  7. Cool in tin for 10 minutes, then transfer to wire rack to cool completely.
  8. Beat together softened butter, icing sugar, and cocoa powder for icing, adding milk gradually until spreadable.
  9. Spread icing over cooled cake, add decorations if desired, cut into squares, and serve.

Notes

Use room temperature ingredients for smoother batter. Don't overmix after adding flour. Test for doneness starting at 20 minutes. For clean slices, use hot knife wiped dry between cuts.