This No-Bake Blackberry Slump Is A Retro Delight

Name: This No-Bake Blackberry Slump Is A Retro Delight
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Yield: 6
Ingredients: For the dumplings:; 1 cup (130g) all-purpose flour; 2 tablespoons sugar; 1 1/2 teaspoons baking powder; 1/2 teaspoon kosher salt; 2 tablespoons butter; 1/3 cup whole milk; For the berries:; 4 cups (about 24 ounces) fresh or frozen (defrosted and drained) blackberries; 1/2 to 3/4 (100 to 150g) cup sugar (depending on how sweet your berries are and how sweet you want your slump to be); 1/4 teaspoon cinnamon; 1 teaspoon lemon zest; 1 teaspoon lemon juice; 1/3 cup water; Whipping cream or vanilla ice cream, for topping