Bring 5 tablespoons of whiskey and 1 tablespoon of balsamic vinegar to a boil along with the herb stalks. Use a small pot for this.
Let it simmer for about 5 minutes until half of it has evaporated. Then you have your essence. Pour it into a small bowl and let it cool slightly before use.
Wipe the pot so it can be used again.
Bring 5 tablespoons of whiskey and 1 tablespoon of balsamic vinegar to a high heat and set it on fire. Let it burn out, it typically takes only 10-15 seconds. Add ketchup, BBQ sauce, and tomato puree to the very hot pan and let it "burn/scorch" for 30-45 seconds.
Reduce to low heat and add the whiskey essence.
Then add the sugar and the chopped rosemary and thyme leaves.
Let it simmer for 5 minutes and add the cream.
Let it simmer for another 10 minutes and season with salt, pepper, and lemon juice.