Mississippi Mud Pie

Mississippi mud pie is an American chocolate dessert known for its dark, dense filling and creamy finish. In this version, a digestive biscuit crumb crust gives a crisp, buttery base for a baked chocolate custard made with dark chocolate, cocoa, cream, eggs and vanilla. The filling should set at the edges while staying slightly soft in the centre, then chill until sliceable. A topping of softly whipped cream and a fine dusting of cocoa keeps the pie rich but not heavy, making it well suited to make-ahead entertaining or a generous weekend dessert.
Cuisine style American dessert
Flavor profile Rich chocolate • Sweet • Creamy
Techniques Baking • Chilling • Whipping
Key equipment Oven • Pie dish • Hand mixer
Cooking style Make-ahead friendly • Crowd-friendly
Time commitment Make-ahead friendly

Why this recipe works

  • Contrasting layers: The crisp biscuit crust supports a dense chocolate filling and a light whipped cream topping.
  • Smooth chocolate centre: Warming the chocolate gently with cream creates a glossy base for a rich, even filling.
  • Designed to chill: The pie needs time in the fridge, making it well suited to preparing before serving.

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Timing notes

  • Allow enough chilling time: The filling should be fully chilled before slicing; the fridge time is what gives the pie its clean layers.
  • Cool before chilling: Let the baked pie cool at room temperature first so it sets evenly and does not create excess condensation in the fridge.

Texture tips

  • Keep the filling smooth: Warm the chocolate and cream gently and take the pan off the heat before the mixture gets too hot.
  • Bake to a gentle wobble: The edges should be set while the centre still moves slightly; it will continue to firm as it cools and chills.
  • Whip to soft peaks: Stop once the cream holds soft peaks so the topping stays billowy rather than stiff or grainy.

Ingredient notes

  • Use baking chocolate: Dark baking chocolate melts reliably and gives the filling a deeper cocoa flavour than standard eating chocolate.
  • Digestives make a sturdy crust: Digestive biscuit crumbs create a firm, lightly wheaty base that balances the richness of the chocolate.

Make-ahead tips

  • Bake the pie in advance: The crust and chocolate filling can be baked and chilled ahead, then finished with whipped cream closer to serving.
  • Add the topping last: For the neatest finish, keep the pie covered in the fridge and add the whipped cream and cocoa dusting just before serving.
  • Good for next-day serving: A longer chill helps the filling settle into a firmer, cleaner-slicing texture.

Equipment you'll need

Ingredients

Crust

Chocolate filling

Topping

Instructions
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  1. Heat the oven to 180°C (355°F). Tip the digestive biscuit crumbs into a bowl with the fine sea salt. Melt the unsalted butter in a saucepan over low heat.
  2. Pour the melted butter over the crumbs and mix until evenly moistened. Press firmly into a pie dish, pushing the crumbs up the sides to form a neat edge. Bake for 10 minutes, then set aside to cool slightly.
  3. Reduce the oven to 160°C (320°F). Break the dark baking chocolate into a saucepan, add the double cream, and warm gently, stirring, until smooth and glossy. Take off the heat and leave for 2 minutes to cool slightly.
  4. Whisk the caster sugar and cocoa powder together in a bowl to remove any lumps. Whisk in the eggs and vanilla extract until smooth, then whisk in the warm chocolate mixture. Pour into the crust.
  5. Bake for 22 to 28 minutes, until the edges are set and the centre still has a gentle wobble. Cool at room temperature for 45 minutes. Chill for at least 2 hours until fully set for clean slices.
  6. Whip the whipping cream with the remaining caster sugar until it holds soft peaks. Spoon or swirl over the chilled pie. Dust lightly with cocoa powder just before serving.

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Recipe notes

Tips

  • For the cleanest layers, chill the baked filling until fully set before adding the whipped cream topping.
  • Warm the chocolate and double cream gently and avoid boiling, so the filling stays smooth and glossy.
  • If serving to pregnant people, young children, older adults, or anyone immunocompromised, use eggs that are produced to be eaten lightly cooked and ensure the filling is baked until fully set.

Substitutions

  • Replace digestive biscuit crumbs with digestive biscuits, crushed to fine crumbs, for the same crust texture.
  • Replace vanilla extract with vanilla bean paste for a more pronounced vanilla flavour.
  • Replace caster sugar with granulated sugar, whisking a little longer so it dissolves well in the filling.

Storage

  • Refrigerate up to 3 days
  • Keep covered in the fridge for up to 3 days. For the best finish, add the whipped cream topping close to serving; if already topped, store loosely covered and expect the cream to soften slightly.

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Recipe overview

  • Servings: 10 servings
  • Total time: 4h (40min active)
  • Difficulty: Medium
  • Cuisine: American
  • Allergens:
    Eggs Gluten Milk Wheat
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