If you're as pistachio-obsessed as I am, you're going to flip over this silky, nutty, slightly salty pistachio frosting. A reader actually requested this recipe (I LOVE when that happens!) and it was already on my list-so clearly, it was meant to be. It takes just 5 minutes to whip up, uses pistachio butter or paste (yep, I’ve got instructions for both), and makes enough to frost 12 cupcakes with gorgeous bakery-style swirls or fill and frost a full 9” cake. Basically, it’s your pistachio buttercream dreams come true.
In the bowl of a hand or stand mixer fitted with the paddle attachment add the 3/4 cup butter and 3 cups powdered sugar and mix on low speed for 30 seconds-1 minute.
Move to a medium speed when the sugar is more incorporated. Mix for 2 minutes.
Stop the mixer and add in the 4 tbsp pistachio butter, and 1 tsp vanilla extract, pinch of salt, and 1 tbsp cream. Mix on medium-high speed for 1 minute-2 minutes.
Pipe over cupcakes. The icing should have stiff peaks, and hold its shape, not runny at all.
Notes
If you are using pistachio paste use 3 tbsp.Storage You can make this ahead and leave it in an airtight container for 5 days. Cupcakes frosted do not need to be refrigerated.FreezingI prefer to wrap my frosting in plastic wrap so I dont waste any containers. Dump your frosting onto plastic wrap and wrap into a neat package, freeze for up to 3 months. Defrost in fridge overnight when needed.