Lots of awesome ideas in this thread. I actually make a "cereal" every night for dessert. It's not a calorie-bomb, but it's pretty high carb (over 60g), so it may not be what you're looking for. Here's the recipe:
1/3 C banana chips, chopped
1/4 C raisins (fresh raspberries work well, too)
1 square 70% dark chocolate, chopped
1/2 TBSP coconut oil
1 TBSP raw honey
Mix it all together and you're good to go. Super easy and quick to prepare. You could definitely add some raw milk or coconut milk and it'd be pretty good.