The Best Yellow Cake with Funfetti Crumbs

  • Author: Jessica Holmes
  • Prep Time: 40 minutes
  • Cook Time: 40 minutes
  • Total Time: 1 hour 20 minutes
  • Yield: Serves 10
  • Category: Cake
  • Cuisine: American


The best Yellow Cake complete with sour cream chocolate frosting AND homemade funfetti cookie crumbs.


Yellow cake 

  • 115 grams (1/2 cup or 1 stick) unsalted butter, room temperature
  • 150 grams (3/4 cup) caster sugar
  • 2 teaspoons vanilla extract
  • 1 large egg, room temperature
  • 210 grams (1 and 1/2 cups) plain flour
  • 2 teaspoons baking powder
  • 120 ml (1/2 cup) full fat milk, room temperature
  • 60 ml (1/4 cup) full fat sour cream*, room temperature

Chocolate sour cream frosting

  • 115 grams (1/2 cup or 1 stick) unsalted butter, room temperature
  • 435 grams (3 and 1/2 cups) icing or powdered sugar, sifted
  • 40 grams (1/2 cup) cocoa powder
  • 120 ml (1/2 cup) full fat sour cream

Funfetti crumbs

  • 105 grams (3/4 cup) plain flour
  • 50 grams (1/4 cupcaster sugar
  • 1 tablespoon cornflour or corn starch
  • 1 teaspoon vanilla extract
  • 60 grams (1/4 cup) unsalted butter, melted
  • 2 tablespoons funfetti sprinkles


  1. Preheat oven to 180 C (350 F) standard / 160 C (320 F) fan-forced. Line and grease a round 8 inch cake tin with baking or parchment paper.
  2. In a large mixing bowl, beat butter, sugar and vanilla together until pale and creamy.  Add egg, beat briefly until combined, then scrape down the sides of the bowl. In a separate bowl, sift together the plain flour and baking powder.
  3. Add half of the flour mixture to the butter, along with all the milk and sour cream and slowly mix together on a low speed. Add the remaining flour mixture and continue to mix until smooth and creamy.
  4. Pour the cake batter into your prepared tin and bake in the oven for approximately 30-35 minutes or until a skewer inserted into the middle of the cake comes out clean. Leave to cool for 10 minutes before gently removing from the tin and leaving to cool completely on a wire rack.
  5. To make the frosting, beat the butter until smooth and creamy. Add the sifted sugar, one cup at a time, continue to beat. Add cocoa powder and sour cream and beat until thick and creamy. Frost the top of your cake using a small spatula.
  6. Next make the funfetti crumbs. In a large mixing bowl, add flour, sugar and cornflour. Whisk together. Pour over melted butter, along with the vanilla, stir briefly. Add sprinkles and then stir until it forms wet crumbs that look like wet sand.
  7. Pour onto a baking tray lined with baking paper and spread out into one layer. Bake for 10 minutes, then leave to cool completely. Decorate the top of your cake with the crumbs.


*If you don’t have sour cream, a thick full fat Greek yogurt or natural yogurt will work as well.

Keywords: Cake, Yellow, Vanilla, Sour Cream, Chocolate, Frosting, Dessert

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