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plum blackberry cobbler topped with vanilla ice cream
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Plum Blackberry Cobbler with Hazelnut Biscuit Topping

This plum blackberry cobbler with hazelnut biscuit topping delivers the jammiest fruit filling with tender, crumbly topping.
Prep Time20 mins
Bake Time40 mins
Course: Dessert
Cuisine: American
Servings: 4 servings
Author: Vy Tran

Ingredients

Fruit Filling

  • 1 pound plums, sliced into small pieces
  • 8 ounces blackberries
  • 1/4 cup sugar
  • 1 1/2 tablespoons cornstarch
  • scraped seeds from 1 vanilla bean

Biscuit Topping

  • 1 cup all purpose flour
  • 1/2 cup ground hazelnuts
  • 1/4 cup sugar
  • 1/2 tablespoon baking powder
  • 1 stick unsalted butter, cold and cubed
  • 1/8 teaspoon salt
  • 3/4 cup heavy cream and extra for brushing
  • 2 tablespoons demerara sugar
  • 2 tablespoons chopped hazelnuts

Instructions

  • In a food processor, pulse together flour, ground hazelnut, sugar, baking powder, and salt. Pulse in butter just until mixture looks like small pebbles. Drizzle in heavy cream, and pulse just to combine.
  • Transfer dough to a lightly floured surface and pat dough together, incorporating any stray or dry pieces. Put dough into a large bowl and refrigerate for 30 minutes.
  • In a large bowl, toss together plum slices, blackberries, sugar, cornstarch, and vanilla bean. Let sit for 30 minutes to macerate.
  • Preheat oven to 400 degrees F.
  • Transfer the fruit mixture to a large baking dish. It should fill the dish halfway to three-quarters full, leaving a good inch of space for the biscuit topping.
  • Use a large ice cream scoop and scoop biscuit topping onto fruit filling leaving some spaces in between the biscuit.
  • Brush biscuit topping with heavy cream. Sprinkle demerara sugar and chopped hazelnuts over the top.
  • Place the cobbler on a rimmed baking sheet to catch drips, or place aluminum foil beneath it in the oven. 
  • Place baking sheet on middle rack and bake at 400 degrees F until the topping is turning golden brown around the edges and the fruit filling is bubbling.
  • Remove cobbler from oven and let it cook for at least 15 minutes before serving.