Pasteurization only takes about 7 seconds at 160F -- the question is, how are you going to get the eggs up to that temperature? The most reliable method is over a water bath (aka double boiler).
If I remember my thermodynamics correctly, the above works out to 185F and, for comparison purposes, a classic buttercream from Joy came out to 187F. But those calculations don't take into account inefficiencies due to heat loss from streaming the syrup into the egg mixture and via the mixing bowl, the mass and thermal conductivity of which are likely significant.
Mental gymnastics are fun but salmonella isn't. My guess is, real world, the mixture would not be pasteurized. That's backed up by Joy now recommending cooking buttercreams to 160F before beating in the butter.
Not necessarily. It would depend on the mass of the egg mixture and the mass of the syrup. A tiny bit of hot syrup won't bring a large amount of egg mixture up to the pasteurization point. Use a digital thermometer to be certain.
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Pasteurization only takes about 7 seconds at 160F -- the question is, how are you going to get the eggs up to that temperature? The most reliable method is over a water bath (aka double boiler).
If I remember my thermodynamics correctly, the above works out to 185F and, for comparison purposes, a classic buttercream from Joy came out to 187F. But those calculations don't take into account inefficiencies due to heat loss from streaming the syrup into the egg mixture and via the mixing bowl, the mass and thermal conductivity of which are likely significant.
Mental gymnastics are fun but salmonella isn't. My guess is, real world, the mixture would not be pasteurized. That's backed up by Joy now recommending cooking buttercreams to 160F before beating in the butter.
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Not necessarily. It would depend on the mass of the egg mixture and the mass of the syrup. A tiny bit of hot syrup won't bring a large amount of egg mixture up to the pasteurization point. Use a digital thermometer to be certain.