The story refers to this cake.
[![][1]][1]
Source: [Sad Trump cake is the perfect meme to end his campaign](http://www.theverge.com/2016/11/8/13570130/trump-cake-election-2016)

1. un-oven → uneven
2. 1. [frosty](http://www.merriam-webster.com/dictionary/frosty) - unfriendly or cold
 2. [frosting](http://www.dictionary.com/browse/frosting) - a sweet mixture, cooked or uncooked, for coating or filling cakes, cookies and the like; icing.  
3. [bread and butter](http://idioms.thefreedictionary.com/bread+and+butter) - Fig. someone's basic income; someone's livelihood—the source of one's food
3. (Getting a) round -  I'm not sure about this one. I think it's intended to be a pun. Here are some possibilities:
 1. 1.  Cakes are often round (circular).
     2. _Round_ can be used to describe a face. 
     3. [round](http://www.merriam-webster.com/dictionary/round) - a slice of food <_a round of bread_> 
 2. [_Getting around_](http://www.merriam-webster.com/dictionary/get%20around) means to circumvent, evade. 
3. sweet - slang. cool, awesome
4. no ifs, pans or butter → [no ifs, ands, or buts](http://idioms.thefreedictionary.com/no+ifs,+ands,+or+buts) - without excuses or doubts
5. [piece of cake](http://idioms.thefreedictionary.com/piece+of+cake) - Fig. something easy to do

Also, just before the quoted portion, the speaker says
>Some might pan its likeness

_Pans_ are kitchen utensils, but [_pan_](http://www.merriam-webster.com/dictionary/pan) also means _to criticize severely_.


  [1]: https://i.sstatic.net/QV4Ls.jpg