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Chocolate Sprinkle Cake Traybake

A fudgy, moist chocolate cake topped with rich chocolate buttercream and colorful sprinkles, ideal for any celebration or gathering.
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Course Dessert, Snack
Cuisine American, Baked Goods
Servings 24 slices
Calories 306 kcal

Ingredients
  

For the Chocolate Cake

  • 250 g plain flour
  • 85 g cocoa powder
  • 1 teaspoon baking powder
  • 2 tsps bicarbonate of soda
  • 0.5 teaspoon salt
  • 325 g light brown soft sugar
  • 2 large eggs
  • 100 ml sunflower oil or any neutral oil
  • 250 ml sour cream can be replaced with buttermilk
  • 225 ml freshly brewed coffee or double shot of espresso

For the Chocolate Buttercream

  • 150 g salted butter
  • 450 g icing sugar
  • 120 g cocoa powder
  • 2 tsps vanilla extract
  • 120 ml double cream or milk

To Decorate

  • Sprinkles of your choice

Instructions
 

Make the Chocolate Cake

  • Preheat oven to 180ºC / 160ºC Fan / Gas 4 / 350ºF.
  • Line a 13" x 9" baking tin with parchment paper.
  • Sieve the flour, cocoa powder, baking powder, bicarbonate of soda, and salt into a large bowl. Add sugar and whisk.
  • Make a well in the center and add eggs, sunflower oil, sour cream, and coffee.
  • Beat with an electric whisk until smooth.
  • Pour batter into the prepared tin.
  • Bake for 25–30 minutes, until the cake springs back when touched and pulls away from the edges.
  • Let the cake cool completely, then invert so the flat side faces up.

Make the Chocolate Buttercream

  • Beat butter on medium speed until creamy.
  • Reduce speed and slowly add the icing sugar.
  • Add cocoa powder and continue mixing.
  • Pour in double cream and vanilla.
  • Increase speed and whip for 5 minutes until light and fluffy.

Assemble the Traybake

  • Spread the chocolate buttercream evenly over the cooled cake.
  • Add sprinkles generously.
  • Slice into 24 squares and enjoy!

Notes

The batter should be runny to create a moist cake. For a coffee-free version, replace coffee with 225ml hot water.
Keyword Chocolate Buttercream, Chocolate Cake, DESSERT, Party Cake, Traybake