There are actually two different types of taralle (also spelled taralli)...a sweet kind as you described, often using lemon or orange flavoring, and a savory kind, more like American pretzels, shaped sort of like a lopsided ring and flavored with fennel seeds or cracked pepper. The savory kind don't generally use Crisco, though -- they use olive oil and are first boiled then baked.
I'm not as familiar with the sweet kind, but this recipe uses Crisco and it looks like it should work for you:
I know what you're talking about! I am not sure about sprinkles and powdered sugar icing, but the circular cookies, made like a pretzel / bagel (boiled and then baked). Actually I've seen sweet ones with fennel and anise flavorings, not just savory ones. I've never made them but I've wanted to. I found recipes online including through Google Books, most using oil but I did search for taralle and crisco and saw some recipes. Sorry I can't recommend a specific recipe, though.
re: brittle peanut
Thanks! tsfirefly, that sounds like a recipe I can use.
How funny you mentioned the boiled one, brittle peanut, and hence my confusion on the name of the cookie with the icing.
I have been subjected to the boiled 'thing' (yes, circular!) and find it horrid. And yes, that is where I heard the name taralle attached to it.
On the other hand, I have had the soft version since childhood and apparently there was never a name attached to it, other than the people, e.g., Lucy's Cookies, who made them.