Chocolate Poke Cake

This elegant Chocolate Poke Cake features an ultra-moist cocoa sponge base infused with a rich dark chocolate fudge sauce, topped with a velvety layer of whipped chocolate mousse and finished with a rustic garnish of roughly chopped dark chocolate chunks.

Recipe Specifications

• Yield: 12 to 15 generous portions

• Prep Time: 40 minutes

• Baking Time: 30–35 minutes

• Chilling Time: 4 hours minimum (preferably overnight)

• Vessel: 9×13-inch rectangular baking pan

Ingredients Checklist

1. The Rich Cocoa Sponge Base

• 2 cups (250 g) all-purpose flour

• ¾ cup (75 g) unsweetened Dutch-processed cocoa powder

• 2 cups (400 g) granulated sugar

• 2 teaspoons baking powder

• 1 ½ teaspoons baking soda

• 1 teaspoon fine sea salt

• 2 large eggs, room temperature

• 1 cup (240 ml) whole milk + 1 tablespoon white vinegar (homemade buttermilk)

• ½ cup (120 ml) neutral vegetable oil

• 2 teaspoons pure vanilla extract

• 1 cup (240 ml) hot freshly brewed black coffee or boiling water

2. The Fudge Filling Sauce

• 1 can (397 g) sweetened condensed milk

• 200 g high-quality dark chocolate (60% cacao), finely chopped

• ¼ cup (60 ml) heavy cream

3. The Whipped Chocolate Mousse Topping

• 2 cups (480 ml) heavy whipping cream, ice-cold

• ½ cup (60 g) powdered sugar, sifted

• ⅓ cup (35 g) unsweetened cocoa powder, sifted

• 1 teaspoon pure vanilla extract

4. The Garnish

• 1 cup (150 g) high-quality dark chocolate block, roughly chopped

• 1 teaspoon cocoa powder for dusting

Step-by-Step Production & Assembly Guide

+-------------------------------------------------------------+
|     GARNISH: Roughly Chopped Dark Chocolate Chunks          |
+-------------------------------------------------------------+
|     TOPPING: Light, Silky Whipped Chocolate Mousse          |
+-------------------------------------------------------------+
|     CORE: Even Poke Holes Filled with Dark Chocolate Fudge  |
+-------------------------------------------------------------+
|     BASE: Coffee-Bloomed Ultra-Moist Cocoa Sponge Cake      |
+-------------------------------------------------------------+
|               STEP-CHILLED FOR CLEAN BAKERY SLICES          |
+-------------------------------------------------------------+

Phase 1: Baking & Poking the Sponge

1. Oven Prep: Preheat your baking oven to 175°C (350°F). Grease a 9×13-inch baking pan or line it with parchment paper.

2. Dry Ingredients: In a large bowl, sift together the flour, ¾ cup cocoa powder, granulated sugar, baking powder, baking soda, and salt. Whisk briefly to combine.

3. Wet Ingredients: Add the eggs, buttermilk mixture (milk + vinegar), vegetable oil, and vanilla extract. Beat with a hand mixer on medium speed for 2 minutes until thick and smooth.

4. Blooming the Cocoa: Reduce the mixer speed to low and slowly pour in the hot coffee. The batter will become completely liquid; this ensures a deep flavor and high-moisture crumb.

5. The Bake: Pour the batter into the prepared pan and bake for 30 to 35 minutes. A toothpick inserted into the center should come out clean.

6. The Poke Step: Let the cake cool for 10 minutes (it should still be warm). Using the round handle of a wooden spoon (about 1 cm wide), punch holes across the entire surface of the cake at 2 cm intervals, going about two-thirds of the way down.

Phase 2: Preparing the Fudge Infusion

1. The Melt: In a small saucepan over low heat, combine the sweetened condensed milk, 200 g of chopped dark chocolate, and ¼ cup of heavy cream. Stir constantly until completely melted, smooth, and glossy.

2. The Infusion: Pour the warm fudge sauce directly over the warm cake. Use an offset spatula to guide the sauce into the poke holes until they are completely filled.

3. Initial Cool: Allow the cake to cool to room temperature on the counter, then transfer it to the refrigerator to set for 1 hour.

Phase 3: Whipping the Mousse Topping

1. Aerating the Cream: In a chilled mixing bowl, combine the ice-cold heavy whipping cream, powdered sugar, ⅓ cup sifted cocoa powder, and vanilla extract.

2. The Stiff Peak: Whip on medium-high speed for 3 to 4 minutes until the mixture expands into a thick, airy mousse that holds stiff peaks. Do not over-whip.

3. The Top Coat: Spread the chocolate mousse evenly over the chilled fudge layer using an offset spatula, creating rustic peaks and swirls.

Phase 4: Garnish & Deep Chill

1. The Presentation: Scatter the roughly chopped dark chocolate chunks generously over the mousse layer. Lightly dust the top with a teaspoon of cocoa powder using a fine sieve.

2. The Cold Set: Cover the pan loosely and refrigerate for a minimum of 4 hours, or ideally overnight, allowing the layers to completely stabilize.

3. Serving: Slice using a sharp chef’s knife dipped in hot water and wiped completely dry between each cut for perfectly clean, distinct layers.

Pastry Chef Success Tips

The Hot Coffee Rule: The hot coffee does not make the cake taste like coffee; instead, the heat dissolves the starches in the cocoa powder, blooming the chocolate to unleash its deepest flavor notes.

Preventing Sogginess: Ensure both the cake and the fudge sauce are warm but not piping hot when combining them. If you pour boiling liquid onto a boiling hot cake, it breaks down the gluten matrix, turning the cake into a dense, gummy paste rather than an ultra-moist sponge.

Storage & Preservation Logistics

Refrigeration Parameters

Because of the fresh whipped dairy mousse topping, this cake must be stored in the refrigerator at all times. Keep it inside an airtight container or a covered pan; it will remain completely moist and fresh for up to 5 days.

Freezing Guidelines

You can freeze the sponge base after filling it with the fudge sauce but before adding the whipped mousse topping. Wrap the cooled, fudge-infused cake tightly in plastic wrap and aluminum foil for up to 1 month. Thaw overnight in the refrigerator, then spread with fresh whipped mousse and chocolate chunks right before serving.