This is a delicious frosting recipe made with real raspberries, try it on sheet cakes, cupcakes, or layers cakes! This recipe makes enough frosting for 24 cupcakes or one two-layer 24cm diameter cake.
In a small saucepan set over medium heat, add the raspberries, lemon juice, and sugar. Allow the sugar to melt and the raspberries to soften.
Help the raspberries break down by using a spatula to press them against the sides of the saucepan.
Once the sugar has melted and the raspberries are soft and no longer whole, allow the puree to cook and thicken for about 5 minutes.
Remove from the heat and pour into a glass jar, allow to cool completely. Place it in the fridge to speed this up if you are short on time.
Raspberry Buttercream
To make the frosting, combine the butter and the icing sugar in a bowl of an electric mixer fitted with a paddle attachment. Beat until combined.
Add the vanilla to the milk and slowly add this to the icing sugar mixture, while beating on medium-high speed. Scrape down the sides of the bowl and mix again to ensure everything is mixing evenly. Beat until light and fluffy, about 5 minutes.
Add the raspberry puree to the frosting and beat again briefly until combined. Use on cakes or cupcakes and store the remaining puree in the fridge or freezer.