Whisk together the flour and the milk. Heat in a small sauce pan on medium heat.
Whisk continuously until it starts to thicken. Let it cook, while stirring, until you can start to see the bottom of the pan. It should still be liquid-ish though, like this:
It’s okay if you have lumps, because we’re gonna strain those out right now. Place the mixture in a mesh strainer and stir with a rubber spatula to push it through.
You should end up with a nice, smooth mixture. It’s almost like pudding before it’s set.
Put this mixture in the fridge and let it cool completely, it’s fine if it stays in there long enough to get chilly, you just don’t want it warm at all. When it is chilled, you can move on to the following step.
It an electric stand mixer, beat the butter and the sugar for a minute or two until well combined and fluffy. You’ll want to use the whisk attachment on a stand mixer, not the flat paddle. Then while beating, add in the thickened milk mixture and the vanilla. Beat to combine and then scrape down the sides. Don’t be scared. It’s going to look like a goopy mess and kind of lumpy and separated like this:
But you just wait. It’s gonna blow your mind in a few minutes. Beat on med-high for 7-8 minutes. Yes, that long. I know it seems like forever, but that’s when the magic happens!
After 7-8 minutes it will have transformed from that sloppy mess into something gorgeous, fluffy, and incredibly light and silky.
Use it to fill or frost cupcakes, cakes or other pastries. You can’t go wrong putting this on just about anything :)
Perfect Cupcake Frosting and Filling
recipe by ourbestbites.com
3 T Flour
1/2 C milk (whole milk is best, but I used non-fat when it's all I have and it's actually fine)
1/2 C real butter
1/2 C sugar (that's granulated sugar, not powdered sugar)
1 t vanilla extract, or other flavor if you wish.
Whisk together the flour and the milk. Heat in a small sauce pan on medium heat. Whisk continuously until it starts to thicken. I think this is the critical point for any of you who have had problems with this recipe. I have a feeling people are under-cooking this part. Let it cook, while stirring, until it looks like pudding (you should be able to see the bottom of the pan when you stir it). Even though it's thick, you can still it through a mesh strainer (just whisk the mixture in the strainer to push the thick stuff through) and then let it cool completely to room temp. or chill it in the fridge. It needs to be cooled completely. If you don't let it cool completely, it will melt the butter and you'll have runny frosting.
It an electric stand mixer, beat the butter and the sugar for a minute or two until well combined and fluffy. You'll want to use the whisk attachment on a stand mixer, not the flat paddle. Then while beating, add in the thickened milk mixture and the vanilla. Beat on the highest speed you can get to without it spraying all over the place for 7 minutes. Yes, 7 whole minutes, maybe even 8 or 9. I know that seems like a long time, but that's when the magic happens!
You will be scared because it will look like a weird goopy mess at first and you'll wonder what on earth you did wrong. Keep beating and something amazing happens. It goes from that goopy mess to something thick, velvety smooth, and perfectly fluffy.
Use it to fill cupcakes or other pastries, or as a frosting on top. You can't go wrong putting this on just about anything :)
One batch makes enough to frost 12 cupcakes .