While watching an Aussie TV show I heard them mention 'chocolate crackles. Chocolate crackles were a favorite of many of my New Zealand friends, as birthday treats when we were kids.
Place 4 cups rice Krispies in a bowl. Sift in 1 cup powdered sugar, 3tbs cocoa. Add 1 cup fine unsweetened coconut. Stir to mix.
Melt, over low heat, 250 grams coconut oil, cool a couple of minutes then pour over rice Krispie mix in bowl. Stir to mix.
Fill paper baking cups with mixture, then place in fridge to set up. These are not exactly low calorie, but taste pretty good.