How can I make my crinkles less dry? I just made chocolate crinkles for the first time and I really like them, but they are a bit too dry, making them slightly crumbly. It's possible I over-baked them a little bit, I'll try to bake them a minute less next time. Is there something else I can do to get them some more moist?
I halfed this recipe, resulting in:

41 g cocoa powder
75 g sugar
60 ml oil
2 eggs
1 tsp vanilla
130 g flour
1 tsp baking powder
1/4 tsp salt

I followed the recipe closely for the preparation and I let the dough chill overnight.
You could try replacing part of the sugar with a liquid alternative: molasses, maple syrup, honey, et cetera. You don't need to modify it much to start with, try replacing 10 grams of the sugar with 10 grams of an alternative.

Volume conversions can be found in section 1.2 of

http://realfoodliving.com/faqs/sweeteners-faqs

but I can't find any weight conversions.