Given the task definition and input, reply with output. In this task, you will be presented with the directions of a recipe separated by "," and have to fill in the "___" which is a step that is missing from the recipe.

Whip the cream until stiff peaks form. Well, I tried that, and got a bunch of bubbles, so bubbles work too!,______,Whisk in the frozen lemonade concentrate. It's okay if it did what mine did and sat out too long and melted a little and made the mixture liquidy.,Pour the contents into a freezer-safe container, and freeze overnight.

Whisk in the pudding mix, careful to get all the lumps out but don't overmix. Let sit for a few minutes to thicken up.