Coke and Angostura
They mesh very well together, bringing out a lot of the warm spice notes that lurk somewhere in Coke but never quite come out.
Cranberry, Ginger Ale, Orange
Reminds me of a Thanksgiving table relish: lots of cranberry with a little orange and ginger. (I like more cranberry than orange in this one.)
Dr Pepper and Chocolate
Sort of a Tootsie roll-esque, "chocolate" rather than chocolate effect going on here.
Orangina and Peychaud's
We tried orange soda and Peychaud's, too, but the less-sweet, actually-orangier Orangina worked much better.
Sprite and Cranberry
We thought that all of the fruit flavors had potential with Sprite, but the soda was just too sweet to carry off peach and plum. Cranberry, on the other hand, tart and bitter and so distinctively flavored, worked perfectly. Also: cranberry ginger ale.
Coke and Black Walnut
"This smells like curry!" said Serious Eats NY editor Max on first whiff—no, really. There's robust spice going on here, cinnamon and clove and something more savory, but it dries out and spices up the Coke in a really appealing way.
Coke and Mole Bitters
You know how some people use Coca-Cola to braise carnitas or ribs? Imagine cayenne along with rich flavors of cinnamon, allspice, and cocoa and you'll start to see why this bizarrely savory, but very drinkable combination works.
Root Beer and Angostura
In its own weird way tastes like boozy eggnog, a little bourbon-sweet and nutmeggy. Covers some of root beer's medicinal characteristics while amping up the warm spice.
Root Beer and Peychaud's
Sort of like a super root beer—less medicinal and a whole lot brighter than without the Peychaud's.