Show: Good Eats
Episode: The Icing Man Cometh
4 eggs, room temperature
1/2-cup dark corn syrup
10 ounces butter, cubed and at room temperature
In a large mixing bowl, whip the eggs until light and fluffy.
In a small saucepan bring the sugar and the corn syrup to a boil. Lubricate the inside of a metal baster with a small amount of vegetable oil and dispense it completely. Then use this to drizzle the sugar mixture into the mixing bowl with the eggs. The mixer should be on low speed until you finish drizzling in all of the sugar mixture.
Once the entire mixture of the sugar is incorporated, slowly add the butter pieces. Only add more butter when you can no longer see the previously added pieces. It will go fast at first and then slow down. Continue to whip until the mixture is creamy.
The only deviation I made from this was drizzling the sugar/corn syrup mixture directly into the bowl from the pan. It was done slowly enough.
I kept waiting for the mixture to firm up as the butter was added, but it never did happen.
An overnight in the refrigerator firmed it up a bit, but mixing it just confirmed it to be a viscous liquid. Even the addition of confectioner's sugar didn't seem to be heading me in the right direction, so I abandoned the attempt.
And Thanks for asking...