The interesting thing about Alton's frosting is that you can't taste the mayo! It's just there for texture. It just tastes like chocolate buttercream at the end (though slightly fluffier and softer than your standard american buttercream).
Very interesting!
I remember Ree Drummond on her show making the ermine frosting when she did red velvet cake, and she mentioned it being there before cream cheese as well. Can you share your recipe? I'm planning on making a red velvet cake for Easter, and I'm not a fan of cream cheese frosting.
My pleasure! This is what I did the other day:
(Everything by weight)
1 cup (227g) whole milk
1 cup (192g) granulated sugar
1 cup (227g) butter (I used salted)
1/4 cup (30g) King Arthur AP flour (although next time I shall try using 45g, which is the equivalent of 6 tablespoons with this brand of flour- I want it just a little stiffer)
1 tsp. vanilla (or to taste)
Mix the flour and sugar together to combine, then whisk it into the milk in a heavy-bottomed saucepan so that there are no lumps. Turn the burner on medium heat and cook the mixture, stirring/whisking fairly constantly until it has become a very thick paste that's the consistency of mashed potatoes (it took mine 18 minutes from the time I turned my burner on until I had mashed potatoes, by the way). Once it's reached that stage, remove the paste to a bowl, cover with plastic wrap touching the surface, and refrigerate until completely cool. For convenience sake, you can make the roux and refrigerate it a day or 2 before you plan on making the frosting.
Whenever you are ready to make the frosting, plan to have the roux and the butter within a temp range of between 60F to 68F by the time you mix them both together. It's okay if one is a little higher or lower than the other, but just aim to have them somewhere within that range. This temp-range works really well for me- things are soft enough to work with, but not too soft, if you know what I mean.
Before mixing the butter and the roux together, I beat them separately. Beat the roux and the vanilla together for about 4 minutes or so until it's nice and smooth and set aside. Then in a separate bowl beat the butter until light and fluffy, then dump the roux into the butter in one fell swoop and beat on high for about 5 minutes or until light and creamy.
Alternatively, instead of beating both separately at first, beat the roux, then with the beaters still on, just add the unbeaten butter to it bit by bit until it's all incorporated, then beat on high for about 5 minutes until light and creamy.
You can use it right away or store it in the fridge to use later (will keep for a week or 2). If you store it in the fridge, it will set up just like butter. To make it spreadable in that case, just bring it to room temp and give it a good stir or whisking before frosting your cake.
IrishLass