Mississippi mud pie is a deeply chocolatey Southern dessert with a crumbly cookie crust, a dense brownie-like filling, and a glossy chocolate ganache topping. This version, inspired by the Cook’s Country approach, layers a rich, fudgy center over a crisp chocolate wafer crust and finishes with a smooth ganache that sets into a shiny, sliceable top. The combination of textures—crunchy crust, dense filling, and silky glaze—makes it a standout for chocolate lovers.
Ingredients
- For the crust:
- 1 ½ cups (170 g) chocolate wafer crumbs (about 30 wafers)
- 5 tablespoons (70 g) unsalted butter, melted
- 2 tablespoons (25 g) granulated sugar
- Pinch of salt
- For the filling:
- 1 cup (2 sticks / 226 g) unsalted butter, cut into pieces
- 4 oz (113 g) unsweetened chocolate, chopped
- 1 ½ cups (300 g) granulated sugar
- 3 large eggs, room temperature
- 1 teaspoon vanilla extract
- ½ cup (60 g) all-purpose flour
- ¼ teaspoon salt
- For the ganache:
- 6 oz (170 g) semisweet or bittersweet chocolate, finely chopped
- ¾ cup (180 ml) heavy cream
- 2 tablespoons (30 g) unsalted butter, softened
- 1 teaspoon vanilla extract
Instructions
- Make the crust: Preheat the oven to 350°F (175°C). In a medium bowl, combine the chocolate wafer crumbs, melted butter, sugar, and salt. Press the mixture firmly into the bottom and up the sides of a 9-inch (23 cm) pie plate. Bake for 10 minutes, then set aside to cool slightly while you make the filling.
- Make the filling: In a heatproof bowl set over a pot of simmering water (or in the microwave in 30-second bursts), melt the butter and unsweetened chocolate together, stirring until smooth. Remove from heat and whisk in the sugar. Let cool for 5 minutes.
- Whisk in the eggs one at a time, beating well after each addition. Stir in the vanilla. Add the flour and salt, and whisk until just combined—do not overmix.
- Pour the filling into the pre-baked crust. Bake at 350°F (175°C) for 30–35 minutes, until the edges are set and the center is just slightly jiggly. A toothpick inserted 2 inches from the edge should come out with a few moist crumbs. The internal temperature of the filling should reach 160°F (71°C) as per USDA FSIS safe minimum for egg dishes. Let cool completely on a wire rack, about 1 hour.
- Make the ganache: Place the chopped chocolate in a medium bowl. Heat the cream in a small saucepan over medium heat until just simmering. Pour the hot cream over the chocolate and let sit for 2 minutes. Add the butter and vanilla, then stir gently until smooth and glossy.
- Pour the ganache over the cooled filling, spreading it evenly to the edges. Refrigerate the pie for at least 2 hours, until the ganache is set and firm.
- To serve, let the pie sit at room temperature for 10–15 minutes before slicing. Use a sharp knife dipped in hot water for clean slices.
Tips
- Chocolate wafer crumbs: If you can’t find chocolate wafers, use chocolate graham crackers or Oreo cookies (remove the cream filling) and pulse them in a food processor until fine.
- Don’t overbake the filling: The center will look slightly underdone when you pull it out, but it will set as it cools. Overbaking makes the filling dry and cakey instead of fudgy.
- Chill thoroughly: The ganache needs at least 2 hours in the fridge to firm up. If you’re in a hurry, you can freeze the pie for 30 minutes, but the texture will be slightly less silky.
- Cutting clean slices: Dip your knife in hot water and wipe it dry between each cut. This prevents the ganache from dragging and gives you neat, bakery-style slices.
Serving Suggestions
Serve the pie chilled or at room temperature. A dollop of lightly sweetened whipped cream or a scoop of vanilla ice cream balances the intense chocolate. For a Southern twist, add a drizzle of bourbon caramel sauce (omit for kids).
Variations
- Peanut butter mud pie: Swirl ½ cup (130 g) creamy peanut butter into the filling before baking.
- Mint chocolate: Add ½ teaspoon peppermint extract to the ganache and top with crushed peppermint candies.
- Espresso kick: Dissolve 1 teaspoon instant espresso powder in the melted butter-chocolate mixture for a deeper coffee-chocolate flavor.
- Gluten-free: Use gluten-free chocolate wafer cookies and substitute the all-purpose flour with a 1:1 gluten-free flour blend.
Storage and Reheating
Store the pie covered in the refrigerator for up to 4 days. It can also be frozen for up to 2 months—wrap it tightly in plastic wrap and then foil. To serve after freezing, thaw in the refrigerator overnight. The pie is best served cold or at room temperature; if you prefer it warm, microwave individual slices for 15–20 seconds, but note that the ganache will soften.
Frequently Asked Questions
Can I use milk chocolate instead of unsweetened? Yes, but reduce the sugar in the filling to 1 cup (200 g) because milk chocolate is sweeter. The texture will be softer and less intense.
Why is my filling cracked on top? Cracks usually happen from overbaking or a sudden temperature change. Make sure you pull the pie out when the center is still slightly jiggly, and cool it gradually on a rack away from drafts.
Can I make this pie in a regular pie dish instead of a pie plate? Yes, a 9-inch (23 cm) standard pie dish works perfectly. Just adjust the crust amount slightly—if the dish is shallower, you may have leftover crust.
How do I know when the filling is done without a thermometer? The edges should look set and slightly puffed, while the center should wobble like gelatin. A toothpick inserted 2 inches from the edge should come out with moist crumbs, not wet batter.
Can I skip the ganache? Yes, but the pie will be less glossy and more like a brownie pie. You can dust with powdered sugar instead.
Is this pie safe for pregnant women? Since the filling contains eggs, it must be cooked to 160°F (71°C) to be safe. The recipe as written reaches that temperature during baking, so it is safe for everyone when fully baked.
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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
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