Chocolate Orange Tray Bake

Deliciously rich chocolate cake smothered in silky buttercream and flavoured with orange. This Chocolate Orange Tray Bake is a simple cake to whip up for any occasion. 

Course Cake
Cuisine British
Keyword Cake, Tray Bake, Chocolate Orange
Prep Time 45 minutes
Cook Time 15 minutes
Servings 16
Calories 302 kcal
Author Curly


For the cake

  • 40 g cocoa powder
  • ¼ tsp instant coffee
  • 4 tbsp boiled water
  • 3 eggs
  • 175 g margarine
  • 165 g caster sugar
  • 115 g self raising flour
  • ¼ tsp salt
  • 1 tsp baking powder
  • 1 orange zested (one large or two small oranges)
  • 80 g chocolate orange (½ chocolate orange), roughly chopped

For the buttercream

  • 100 g unsalted butter
  • 150 g icing sugar
  • 50 g cocoa powder
  • 4 tbsp whole milk
  • pinch salt
  • 80 g chocolate orange (½ chocolate orange)
  • sprinkles


  1. Preheat the oven to 160°C (fan assisted, 180°C non fan) and line a 20x26cm tin with baking paper

  2. In the bowl of your mixer, add the cocoa powder, instant coffee and boiled water. Mix until they form a thick paste

  3. Add the rest of the cake ingredients apart from the chocolate orange and zest and mix until combined

  4. Scrape the bottom of the bowl with a spatula and add the chopped chocolate orange and orange zest. Mix briefly

  5. Pour into the prepared tin and smooth out

  6. Bake in the oven for 15 minutes or until a cocktail stick comes out clean

  7. Leave to cool in the tin for 30 minutes before transferring to a wire rack to cool completely

  8. When the cake is completely cooled, make the buttercream. Add the butter to the bowl of your mixer and beat until softened

  9. Add the icing sugar, cocoa powder and salt and mix thoroughly. Add enough milk until you get a thick but spreadable consistency

  10. Bet the buttercream until all of the ingredients are completely combined. Spread the buttercream evenly over the cake and finish with sprinkles and the chocolate orange segments

Recipe Notes

Keep in an airtight container for 2-3 days. 

Nutritional information is given as a guide only and my vary.

Nutrition Facts
Chocolate Orange Tray Bake
Amount Per Serving
Calories 302 Calories from Fat 144
% Daily Value*
Fat 16g25%
Saturated Fat 6g38%
Cholesterol 45mg15%
Sodium 155mg7%
Potassium 145mg4%
Carbohydrates 29g10%
Fiber 2g8%
Sugar 20g22%
Protein 3g6%
Vitamin A 598IU12%
Calcium 35mg4%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.