Let Them See Cake’s Birthday Cake Cookie Sandwich

Let Them See Cake is one of Cardiff's most creative and colourful bakeries, and we're so proud to be the not-so-secret ingredient in some of their signature bakes including this Birthday Cake Cookie Sandwich!

They've been kind enough to share their recipe with us so even if you're not in Cardiff you can give this cookie recipe a spin for yourself! 



Prep Time
Cook Time
Birthday Cake Cookie Sandwich
  • 123g Salted butter, softened
  • 53g Caster sugar
  • 87g (about 87g) Light brown sugar
  • 1 Egg 
  • Vanilla (Use a few drops or 1/4 teaspoon for a small batch)
  • 207g Plain flour
  • 1/2 tsp Bicarbonate of soda
  • 27g of Funfetti sprinkles
  • 115g mini white chocolate chips
  • 58g white chocolate chips

Cream the softened butter and sugars until light and fluffy, scraping down the bowl a few times.
Add in half of the beaten egg (about 41g) and a few drops or 1/4 teaspoon of vanilla extract.
In a separate bowl, combine all the dry ingredients: plain flour, bicarbonate of soda, funfetti sprinkles, mini white chocolate chips, and white chocolate chips.
Slowly add the dry mix to the butter mixture and mix until just combined.

Now, you have the dough ready for your cookies. To make 30 cookies:
Divide the dough into 30 equal portions.
Roll each portion into a ball.

  1. Place the balls on baking sheets.
  2. Bake at 170°C (130°C on the dial for a large oven) for approximately 6-7 minutes, or until the edges are lightly golden. Be sure to keep an eye on them as they bake and adjust the time if needed.
  3. After the first bake, gently flatten and shape the cookies using a round cutter, if desired.
  4. Bake again for another 5-6 minutes, or until the cookies are fully set but still slightly soft in the center.
  5. Remove from the oven and allow them to cool on a wire rack.

Enjoy your batch of 30 Funfetti cookies! You can also prepare the buttercream for cookie sandwiches using the instructions mentioned in the original recipe.