These are two custom foods, tomato soup and spinach cream soup.
Update 2016-02-10: Updated with Czech translations.
Update 2016-01-20: The interactions and script to make custom foods available have been moved to --> this post (same thing, different account). No need to redownload right away but please check there for updates in the future.
Update 2016-01-24: Updated with additional French and Russian translations. Update 2016-01-16: Soups updated with Polish, Italian, and German translations; Interactions also have Polish now. Update 2016-01-11:Interactions and script updated to add custom snacks and put the three fruit shakes from this thread in the snacks pie menu. Update 2016-01-10: Interaction script updated with two more fridges (EP01/GP02). See this post for screenshots. Thanks gato_24 for testing! Update 2016-01-08: Interactions updated with Dutch, Chinese, and Spanish localisation, and to include Tomato Salad from here. Update 2016-01-06: Soups are updated with Dutch, Chinese, and Spanish localisation. Thanks everyone! Update 2016-01-02: Interactions package updated to include Cupcakes from Oven. You need to download the actual cupcake recipes too, this only makes the interactions available. Update 2015-12-31 II: Interactions are updated again to include Chocolate Pudding as well as Make/Serve Dessert sub-menus. You need to download the actual chocolate pudding too -- the interactions only make things available on stoves and fridges when you have the actual food as well. Make/Serve Dessert is available from 11AM to 2AM; includes the pudding as well all of the base game sweets and cakes (except pancakes which I consider more of a full meal, rather than a dessert). Update 2015-12-31: Interactions are now available on the Cool Kitchen stove and fridge too (thanks lewisb40), and all strings are localised for Spanish (thanks gato_24 for the translation!).
They are available on the base game and Cool Kitchen fridges and stoves, either in the Have/Serve Lunch and Have/Serve Dinner menus, or in a “Custom Foods” picker.
Both soups require ingredients: 2 × tomato for the tomato soup, 2 × spinach for the spinach cream soup. This is per serving ‒ for a party-size group meal, you will need 16 tomatos / spinach (the existing picker menu only lists the ingredients for one serving, but the recipes actually use the correct amount). A mod that instills the same kind of logic into the Maxian base game recipes is available here (“More Logical Cooking”; this also overrides the “Ingredients” string with “Ingredients per Serving” to make this less confusing).
When sims dump the finished soup into the serving bowl, the animation is using a light brown effect (see the spinach cream soup “prepare-4” screenshot) -- this is part of the actual animation though, so I cannot easily change it. Is the same thing for a lot of the Maxis recipes as well (there are only four effects available, and lobster/pasta/shrimp would look even weirder for this).
This does not override anything so shouldn’t be very conflict-prone.
US English, Traditional Chinese (wuccwzt), Czech (Rynka_CS), Dutch (ElenaInTheSims), French (Damabiah), German (pbox), Italian (Eámanë), Polish (hubi98), Spanish (gato_24), Russian (igor97), Portuguese (simshout). Thank you!
Soup Bowl, Single ‒ High Poly: 144V/164F
Soup Bowl, Single ‒ Low Poly: 115V/114F
Soup Bowl, Medium ‒ High Poly: 204V/252F
Soup Bowl, Medium ‒ Low Poly: 102V/108F
Soup Bowl, Large ‒ High Poly: 169V/252F
Soup Bowl, Large ‒ Low Poly: 87V/108F