Question 736: My drink of Choice

Simple recipe for a drink
Should really try it out once, feel a sort of kinship with it.
It combines Mathematics with a very famous drink, thus giving the name ___X-Y____

All the blanks save for the 4th one refer to the same concept, the 4th being blank as it would give it away.

Question 676: Faecetious

X is the recently released finding of a lead researcher who is trying something novel with the remains of the sewage sludge in Tokyo.

The results are:

"63% proteins, 25% carbohydrates, 3% lipids and 9% minerals".

There is very little in terms of documented explanation for the ground breaking news, and there is dispute over its authenticity.

Nevertheless, give me X.

Question 574: Dress it and then address it

Fair fa' your honest, sonsie face, Great chieftain o' the puddin-race! Aboon them a' ye tak your place, Painch, tripe, or thairm: Weel are ye wordy o' a grace As lang's my arm.
The groaning trencher there ye fill, Your hurdies like a distant hill, Your pin wad help to mend a mill In time o' need, While thro' your pores the dews distil Like amber bead.
His knife see rustic Labour dicht, An' cut you up wi' ready slicht, Trenching your gushing entrails bricht, Like ony ditch; And then, O what a glorious sicht, Warm-reekin, rich!
Then, horn for horn, they stretch an' strive: Deil tak the hindmaist! on they drive, Till a' their weel-swall'd kytes belyve, Are bent like drums; Then auld Guidman, maist like to rive, "Bethankit" hums.
Is there that o're his French ragout Or olio that wad staw a sow, Or fricassee wad mak her spew Wi' perfect scunner, Looks down wi' sneering, scornfu' view On sic a dinner?
Poor devil! see him ower his trash, As feckless as a wither'd rash, His spindle shank, a guid whip-lash, His nieve a nit; Thro' bloody flood or field to dash, O how unfit!
But mark the Rustic, ______ fed, The trembling earth resounds his tread. Clap in his wallie nieve a blade, He'll mak it whistle; An' legs an' arms, an' heads will sned, Like taps o' thristle.
Ye Pow'rs wha mak mankind your care, And dish them out their bill o' fare, Auld Scotland wants nae skinkin ware That jaups in luggies; But, if ye wish her gratefu' prayer, Gie her a ______!

A  poem about?
By whom?

PS: Pai, this question was intended as a dedication to you...and Tumkur girl.

QUestion 436: I'll take you to the candy shop

__X__ got the idea for __Y__ during the 1930's Spanish Civil war, when he noticed Spanish soldiers munching on chocolates enamelled in a tempered chocolate coating for protection from heat.
THe named the product __Y__ after both himself, and his business partner with whom he had a well
uh
parting
lol

Here's a graph of the colour of __Y__ over the decades

Simple enough

1) ID X and Y
2) And the partner he had a parting with