Buttercream Left Out

Decorating By aprilcreativecakes Updated 3 Apr 2009 , 8:08pm by aprilcreativecakes

aprilcreativecakes Posted 3 Apr 2009 , 6:16pm
post #1 of 8

Can anyone tell me if buttercream made with milk and butter can be left out over night?

7 replies
JanH Posted 3 Apr 2009 , 6:23pm
post #2 of 8

Did you make an American buttercream: lots of powdered sugar, fat (shortening, margarine, butter or any combination) and a little milk or cream?

Most American b/c's are shelf stable, even when milk or cream are used as the liquid.

Sugar is hygroscopic, or moisture absorbing.
The powdered sugar in American b/c's controls the water activity in the butter/margarine and/or milk or cream in the mixture. (Butter and margarine are both 80% fat and 20% water, while shortening is 100% fat.)

Water activity & microbial growth:
(Prolonging Bakery Product Life.)


WJ Scott in 1953 first established that it was water activity, not water content that correlated with bacterial growth:


Formulating for increased shelf life:
(Decreasing water activity results in hostile environment for bacteria.)



aprilcreativecakes Posted 3 Apr 2009 , 6:30pm
post #3 of 8

it is 1/2 cup veg short.
1/2c butter
confectioners sugar
2 tbsp milk

iwantalicakes Posted 3 Apr 2009 , 6:34pm
post #4 of 8

I think what I was told by a wilton instructor is yes you can but once you cut into it that it has to be refrigerated. I could be wrong, you may have to refrigerate at all times.

sweet_teeth Posted 3 Apr 2009 , 6:41pm
post #5 of 8

It will be fine icon_smile.gif I always leave mine out and it contians all butter!

pastryjen Posted 3 Apr 2009 , 6:42pm
post #6 of 8

You should be fine!

JanH Posted 3 Apr 2009 , 6:54pm
post #7 of 8

Hi and Welcome on your 1st post, iwantalicakes. icon_smile.gif

CC is a great place to exchange ideas and learn new techniques, etc. But CC is also a great place to get updated info.

Frostings, and fillings that are perishable and completed cake/s with perishable frostings/fillings do require constant refrigeration, except when being served (2 hr. limit of "out" time).

However, frosting and fillings that are shelf stable and completed cake/s with shelf stable frostings/fillings do NOT require refrigeration.

As a matter of fact, refrigeration tends to stale baked goods, especially bread very quickly.

Science of staling caused by refrigeration:




aprilcreativecakes Posted 3 Apr 2009 , 8:08pm
post #8 of 8

thank you everyone!

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