"Hmm, and we can just find something to throw in there!"

She doesn't mean it in the awful 'let's put something into soup which definitely does not belong in soup kind of way either. Madoka actually does know a thing or two about cooking. She's just saying they can improvise with whatever ingredients they can find!

.. Maybe not avocado though. She's not too sure about avocado soup just yet..

Madoka squeezes the other girl's hand.

"It'll be yummy."