1/2 Cup Strawberry Puree Reduction*
1 Tablespoon Cornstarch
1/2 Cup Non-Dairy Margarine
1/2 Cup Granulated Sugar
1/2 Teaspoon Vanilla Extract
*The strawberry puree reduction is ultra simple to make, but you must have patience. Just take fresh strawberries (at least 1/2 pound, but it's easier to work with if you start with more berries and make extra puree) and thoroughly puree them in your blender or food processor, until completely smooth. If you prefer your frosting to be seedless, go ahead and strain your puree before proceeding. Transfer the berry goo into a medium sauce pan, and set over medium-low heat. Allow it to simmer gently until reduced by half; the amount of time will vary depending on the size and shape of your pot, so make sure you keep an eye on it and stir occasionally. Let cool completely, and measure out 1/2 cup for the frosting.
Place the 1/2 cup of strawberry puree reduction into a medium sauce pan, along with the cornstarch and salt. Whisk vigorously to dissipate any lumps of starch before turning on the heat to medium. Continue whisking gently until the mixture thickens and large bubbles begin to break on the surface. This won't take very long since it's a small amount of liquid, so don't walk away! It takes mere seconds for it to scorch miserably on the bottom. Let cool to room temperature, and then place a piece of plastic wrap directly on the surface. Move the whole pot into your fridge to chill thoroughly- This should take about 1 - 2 hours.
Once the thickened strawberry mixture is completely chilled, place the margarine and sugar (yes, granulated! Do not try using confectioner's here) in the bowl of your stand mixer, and cream together until homogenous. Don't rush this step, as thorough creaming ensures that the sugar granules actually dissolve into the frosting; Allow a solid 3 - 5 minutes here, depending on how cold the margarine is. Finally, add the cooled strawberry mix into the bowl, along with the vanilla. Scrape down the sides as needed, and whip on high speed until the frosting is smooth, creamy, and fluffy. Again, patience is key, so give it time and you will be rewarded!
Makes Enough to Frost 1 Dozen Cupcakes Generously
©Hannah Kaminsky http://www.bittersweetblog.com