Celebratory Concoctions: Birthday Cake Petit Fours

With my birthday just a couple of days away, I admittedly haven’t done much in regards to planning anything special to celebrate. I rarely do when it falls during the week, really- since work and daily responsibilities take precedence over anything else with every year older I get. Gone are the days of disappearing for the entire week leading up to and following my birthday and making it an extravagant, over-the-top, can’t miss affair- and in are the more quiet, subtle celebrations with loved ones.

I *do* know that Troy is making dinner plans the night of, my immediate family have prepared a bit of a get together at the end of the week- and then a group of my friends and I are planning our own dinner party closer to the end of January/beginning of February- but I wanted to do something easy, fun and a bit celebratory leading up to the actual day- and thought I’d bake some cute and colorful mini desserts from scratch for myself and some of my friends who were stopping by to visit.




  • 8 ounces unsalted butter, at room temperature
  • 1½ cups granulated sugar
  • 3 large eggs, at room temperature
  • 2 teaspoons pure vanilla extract
  • 2¼ cups all-purpose flour
  • ½ teaspoon baking powder
  • ¼ teaspoon fine sea salt
  • ½ cup whole milk, at room temperature
  • ⅔ cup rainbow sprinkles


  • 6 ounces unsalted butter, at room temperature
  • 3 cups confectioners’ sugar
  • 2 teaspoons pure vanilla extract
  • 3 tablespoons heavy cream


  • 8 cups confectioners’ sugar
  • ½ cup light corn syrup
  • ½ teaspoon pure vanilla extract
  • Rainbow sprinkles, as needed for finishing


1. MAKE THE CAKE: Preheat the oven to 350°F. Grease and flour a 9-inch square baking pan.

2. In the bowl of an electric mixer fitted with the paddle attachment, cream the butter and sugar until light and fluffy, about 4 minutes.

3. Add the eggs one at a time, mixing on medium speed until each is fully incorporated. Scrape the bowl well, then add the vanilla and mix to combine.

4. In a medium bowl, whisk together the flour, baking powder and salt. In a liquid measuring cup, combine the milk with ¼ cup warm water. Add the flour mixture to the mixer and mix on low speed to combine, about 2 minutes. Pour in the milk mixture in a slow, steady stream and mix to combine, about 1 minute.

5. Pour the batter into the prepared pan. Bake the cake until a toothpick inserted into the center comes out clean, 30 to 35 minutes (the cake will not spring back when you touch it in the middle). Cool in the pan for 15 minutes, then turn out onto a wire rack to cool completely.

6. MAKE THE FILLING: In the bowl of an electric mixer fitted with the paddle [[?]] attachment,cream the butter and confectioners’ sugar until light and fluffy, about 2 minutes. Add the vanilla and cream, and mix to combine.

7. Use a long serrated knife to cut the cake horizontally in half to create two even layers. Place the bottom layer on a baking sheet, then scoop about two-thirds of the frosting on top and spread into an even layer. Place the second layer on top and use the remaining frosting to evenly and smoothly frost the surface of the cake. Chill for 30 minutes.

8. MAKE THE ICING: In a medium-size heat-proof bowl, whisk together the confectioners’ sugar, corn syrup, vanilla extract ⅔ cup water. Set the bowl over a medium pot of simmering water and heat, stirring occasionally, until the mixture is smooth and homogeneous. Let cool. (The icing will thicken as it cools.)

9. Use a sharp knife to cut about ¼ inch off each side of the chilled cake to create flat edges. Cut the cake vertically into six even strips, then horizontally into six even strips, making 36 squares.

10. Place a wire rack over a baking sheet and arrange the petit fours on it. Use a ladle to pour the icing over each cake. It should easily run down the sides and fully coat the cakes. If it gets too thick, warm it up slightly by placing it back on the pot of simmering water and stirring occasionally. You may need to lift the rack off the baking sheet and pour the excess icing back into the bowl to reuse.

11. Once the cakes are glazed, garnish each with a few sprinkles. Leave the cakes to set for 15 minutes; the icing will set up firm.


I’ll never say no to cake or sprinkles.

The vanilla in these mini cakes was heavenly- but of course you can always change up or mix different ingredients to get the exact type flavor you want, instead. For example- I’m thinking of incorporating some lemon or orange the next time I whip a batch of these up- since I love a good citrus-infused dessert, as well.

And chocolate lovers everywhere- adding cocoa powder and chocolate sprinkles into the mix is an easy way to get a nice kick of mocha in these petit fours, too. Don’t be afraid to try different variations!


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Hi! I'm Ashley. I'm a blogger and a radio personality with a makeup and shoe addiction based out of Boston and the Pioneer Valley. These are my (mis)adventures.

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