Well what is in the filling? Is there heavy cream in it? I have made the bailey's chocolate mousse before and you do have to refrigerate that.
okay I looked up the recipe (if you are getting it from this site). I would say if definitely needs to be in the fridge.
Hostess® Twinkie Creme Filling
2 teaspoons very hot water
rounded 1/4 teaspoon salt
2 cups marshmallow creme (1 7-ounce jar)
1/2 cup shortening
1/3 cup powdered sugar
1/2 teaspoon vanilla
Combine the salt with the hot water in a small bowl and stir until salt is dissolved. Let this mixture cool.
Combine the marshmallow creme, shortening, powdered sugar, and vanilla in a medium bowl and mix well with an electric mixer on high speed until fluffy.
Add the salt solution to the filling mixture and combine.
Makes 1 1/2 cups.
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