To prepare a sweet blackberry and brandy sauce recipe, first you'll need to gather your ingredients. First, you will need the following ingredients: 1 cup (240 ml) sliced blackberries 2 tablespoons (28 g) brandied apple cider vinegar 1 teaspoon (2.5 tbsp) sugar 1 tablespoon (25 mg) vanilla extract Instructions Preheat the oven to 375 ?F (191 oC) and prepare your oven rack to line with foil. Place the chopped berries in the bottom of the crock-pot and cover with water. Bring the mixture to boil, then reduce the heat to low and simmer for 20 minutes, stirring occasionally. Remove the pan from heat and let sit for 5 minutes. Pour the sauce into jars and store in an airtight container. Serve with vanilla ice cream or whipped cream.