cereal milk cake with lucky charms filling

Tomorrow is St. Patrick’s Day – are you ready?! Pull out your green and whip up this fun cereal milk cake topped and filled with Lucky Charms marshmallows!

Cereal Milk Cake with Lucky Charms Filling | www.passthecookies.com

There are a few foods that remind me of St. Patrick’s Day. Shepherd’s pie, Irish soda bread, and Lucky Charms immediately come to mind (though Bailey’s, Guinness, and milk dyed with green food coloring are close behind). Though we don’t do much for St. Patrick’s Day in our home, it was always an unexpectedly fun holiday in our house growing up. From making leprechaun houses to eating an entirely green meal, it was all very whimsical. This cereal milk cake decorated with Lucky Charms would fit right in with the theme and fun-spirited mood of the day.

Cereal Milk Cake with Lucky Charms Filling | www.passthecookies.com

There are three key elements to making this cake. The first is soaking the milk with cereal (Frosted Flakes or other frosted cornflake cereals work well). The second is using imitation vanilla extract to get that nostalgic flavor from your childhood. And the third is crushing the marshmallows into the frosting between the cake layers. The marshmallows between the layers are optional, but adding them really makes the frosting reminiscent of eating a bowl of Lucky Charms. Crushed up marshmallows give you the taste of Lucky Charms cereal, without the squeaky feeling of full Lucky Charms marshmallows. You know what I’m talking about.

Cereal Milk Cake-4

The marshmallows decorating on the sides and top of the cake are totally optional, but don’t they look so fun?! If for no other reason, I’ll keep them for that. I pulled these marshmallows straight out of the cereal box, but you can also buy full bags of cereal marshmallows on Amazon! That would limit the confusion when unsuspecting family members pour a bowl of Lucky Charms and end up with only the cereal ;) Whoops.

Cereal Milk Cake with Lucky Charms Filling | www.passthecookies.com

Whichever variation you choose, I hope it brings you lots of luck and joy tomorrow!

Cereal Milk Cake
1 cup (2 sticks) butter, at room temperature
1 1/3 cups sugar
4 egg whites
1 tablespoon clear imitation vanilla
6 tablespoons vegetable oil
2 ½ cups flour
2 ¼ teaspoons baking powder
¾ teaspoon salt
1 cup cereal milk (recipe below)
Marshmallows from cereal (like Lucky Charms), for assembly

Cereal Milk
1 ½ cups milk
1 ½ cups frosted cornflake cereal

Vanilla Frosting
2 cups (or 4 sticks) butter, at room temperature
3 cups powdered sugar (or to taste)
1 teaspoon vanilla
1 teaspoon milk
¼ cup marshmallows from cereal, finely crushed, optional

To make cereal milk:
Pour the milk over the cereal and swirl it around vigorously. Let the milk and cereal soak for about 20 minutes. Strain the milk through a sieve into a small bowl. With the back of a spoon press the cereal into the sieve with the to squeeze the liquid out of the cornflakes, but not forcefully enough to push the cornflakes through the sieve. Discard the soggy cereal (we compost it, but you could also feed it to your pet ;)).

To make cereal milk cake:
Preheat the oven to 350 degrees F. Spray two 8-inch cake pans with non-stick cooking spray. Cut out 8-inch circles of parchment paper. Line the bottom of the pans and spray the parchment with non-stick cooking spray.

In the bowl of an electric mixer, cream together the butter and sugar until light and fluffy. Add the egg whites, one at a time, mixing well after each one. Blend in the vanilla and the oil.

In a medium bowl, whisk together the flour, baking powder and salt. With your mixer running on low speed, add the flour mixture to the butter mixture in three additions, alternating with the cereal milk. Start and end with the flour mixture.

Divide the batter evenly between the pans and bake for about 25-30 minutes, checking to make sure a toothpick inserted in the center of the cakes comes out clean.

Let the cakes cool in the pans for about 5 minutes, then remove them from the pans and transfer them to a wire cooling rack to cool completely. The cake layers should be completely cool before you frost them.

To make the frosting:
Beat together the butter and powdered sugar until the mixture is light and creamy. Add the vanilla and milk and beat to combine. You can add more powdered sugar for a sweeter variation, just add more milk 1 teaspoon at a time to keep the right consistency.

Optional: Separate the frosting into three equal parts. Fold the crushed cereal marshmallows into one part of the frosting. This will be used between the cake layers, while the other two parts will be used to frost the outside of the cake.

To assemble:
Place one cake layer on a cake plate or serving plate and top with the crushed cereal marshmallow frosting, if using. Top with the next cake layer and frost the entire cake with the remaining vanilla frosting. Decorate by placing cereal marshmallows along the sides and top of the cake in any arrangement you like. Only place the marshmallows on the cake if you are serving it soon, otherwise they will get soggy.

Happy (almost) St. Patrick’s Day!

Cake and frosting adapted from Molly Yeh’s funfetti cake

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