We're still under construction here in the Department of Words for Pudding, but the first word that has us puzzled, that started us off on this rather odd quest, is ...
When Websters Unabridged Dictionary 1913 gives a perfectly good derivation of fool from the French fouler, why are both the OED and The American Heritage Dictionary so unhelpful?
We stumbled onto a cornucopia of information at Cooking.com, including an article on Cobblers, Crisps, Betties & Grunts and a trove of recipes. The page discussing the origin of the terms mentions that a "grunt" is also known as a "slump"!
You can also search Cooking.com for recipes for Fools, Crumbles, Cobblers, Crisps, Betties and Grunts.
Allrecipes.com has whole sections on Cobblers and Crisps and Crumbles, including a "crunch" and a "crumb pie", as well as a "Cooks' Encyclopedia" with definitions and some pictures for Betty, Cobbler, Crumble, Duff, Fool, Pandowdy and Slump.
You can find a *LOT* of recipes by looking in the Berkeley Seachable Online Archive of Recipes (SOAR).
From Dictionary.com, we find that the American Heritage Dictionary has grunt as:
New England & Upstate New York. A dessert made by dropping pieces of biscuit dough onto blueberries as they boil and then covering and steaming the mixture.
which matches Allrecipes.com's Apple Slump or Blueberry Grunt, but doesn't sound at all like Cooking.com's recipe for Blueberry Grunt with Hazelnut Topping.
From Dictionary.com, the American Heritage Dictionary has:
For sense 1, Wordnet has "made of fruit with rich biscuit dough usually only on top of the fruit".