Hi Bob :-) I found this recipe on the internet and have not tried it. It is fairly close to what you describe except it calls for simple syrup rather than rock candy and did not seem to have a name but I should think that Rock Candy Brandy would be a good name for it. I hope that this is what you are looking for. If you make it, let me know how it turns out, after aging, of course:-)

First, the part that makes cordials sweet is sugar syrup. It is 1 cup of sugar dissolved in 1/2 cup boiling water. This makes about 2/3 cup sugar syrup and for those of you who have made candy, this is very similar to a recipe for rock candy. If any coridal is not sweet enough, just add a little more sugar or sugar syrup, depending upon what you want to do with it.

Second, the alcohol. Vodka is as pure an alcohol as most of us can get, and since it will be flavored, don't worry about a high quality (or even a medium) vodka. Just get the cheapest stuff you can get. It will serve quite nicely. Brandy and white wine are different. Get what you can afford. A good brandy helps a liquor always.

Since a lot of berries are in season, here is a raspberry recipe.

1 1/2 cups ripe raspberries
sliced and scraped peel of 1/2 lemon
3 cups vodka or 3 cups brandy or 2 parts vodka and 1 part brandy, or substitute white wine for brandy
3/4 cup sugar syrup

Lightly crush the berries, add the lemon peel and berries to the alcohol. Steep for 2-4 weeks. Strain and filter, squeezing all the berries for the juice. Add the sugar syrup and let it mature for 4-6 weeks.

For Creme de Framboise, use all brandy and add 2 cups of sugar syrup.