Where to use the 1/2 c sour cream?

Sorry, about that. ATG117 is right, it get's folded in with the whipped cream.

BTW, many recipe chefs rarely see the hotline or check the comments on their recipe pages. So when i have a question that i really need ansswered, i click on the chef's recipe and then from there i click on their name; and then on their member page, i send them an email by clicking on the envelope symbol. those emails go to them directly.

It could probably get folded in with the reserved whipped cream, but I would message the author or use another recipe.