The LA Brasserie Comme Ca makes a snowcone is a grown-up glass, they call it 'The Rumble', and the good news is it's not hard to make at home.
3 Fresh Blackberries
3/4 oz. Simple Syrup
2 oz. Rum
3/4 oz. Fresh Lemon Juice
1. Combine lemon juice, simple syrup, and rum in a glass.
2. Add crushed ice until glass is full and set aside.
3. In a small dish, muddle blackberries with a drop of simple syrup.
4. Pour blackberry muddle over the ice and serve.