Marshmallow Chocolate Poke Cake Recipe: Gooey Layers of Decadent Indulgence

This layered chocolate cake takes indulgence to new heights with a gooey marshmallow filling that melts in your mouth. The secret lies in poking holes into the warm cake to let the marshmallow creme fill every bite.

With a rich chocolate base and fluffy marshmallow topping, this dessert delivers a perfect balance of textures. It’s a showstopper for any gathering, yet surprisingly simple to make.

Ingredients for Marshmallow Chocolate Poke Cake

Rich cocoa, fluffy marshmallow, and a few pantry staples make this decadent dessert happen.

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The cocoa powder is the backbone here. Hershey’s Special Dark or Ghirardelli Dutch-process gives that deep chocolate flavor you want. Buttermilk matters too—full-fat from the dairy case (not the powdered kind) keeps the cake impossibly moist. The flour should be all-purpose, nothing fancy. I grab mine from King Arthur when I can, but store brand works in a pinch.

No buttermilk? Whole milk plus 1 tbsp vinegar gets you close. Marshmallow creme is non-negotiable—Jet-Puffed or Kraft are the only brands that spread right. Out of cocoa powder? Melted chocolate plus a touch of oil works, but you’ll lose some of that intense flavor. The chocolate chips can be semi-sweet or dark, whatever you’ve got in the baking aisle.

The cake stays fresh wrapped at room temp for 2 days. For longer storage, refrigerate (but bring to room temp before serving). Marshmallow creme can be stored unopened for 6 months—perfect for spontaneous cake cravings.

Step-by-Step Instructions for Marshmallow Chocolate Poke Cake

This method delivers layers of moisture and gooey richness without overwhelming complexity.

Step 1: Prepare the Chocolate Cake Base

Preheat your oven to 350°F and grease a 9×13-inch baking dish. In a large bowl, whisk together the 2 cups All-Purpose Flour, 2 cups Granulated Sugar, 0.75 cup Unsweetened Cocoa Powder, 1.5 tsp Baking Soda, 1.5 tsp Baking Powder, and 1 tsp Salt until fully combined.

In a separate bowl, mix the 2 whole Large Eggs, 1 cup Buttermilk, 0.5 cup Vegetable Oil, and 2 tsp Vanilla Extract. Gradually stir the wet ingredients into the dry mixture until smooth. Slowly add the 1 cup Hot Water while whisking to prevent lumps. The batter will be thin—this is normal.

Step 2: Bake and Cool the Cake

Pour the batter into the prepared baking dish and bake for 25-30 minutes, or until a toothpick inserted into the center comes out clean. Avoid overbaking, as this will make the cake dry and less receptive to the poke technique.

Once done, let the cake cool in the pan for 10 minutes, then transfer it to a wire rack to cool completely. This cooling step is crucial—poking a warm cake will cause crumbling. The cake should be fully set but still slightly springy to the touch.

Step 3: Poke and Fill with Marshmallow Creme

Using the handle of a wooden spoon or a similar tool, poke holes all over the cooled cake, spacing them about 1 inch apart. Make sure the holes penetrate nearly to the bottom of the cake. This creates pockets for the filling to seep into.

Spoon the 1 jar Marshmallow Creme into a microwave-safe bowl and heat for 15-20 seconds to soften slightly. This makes it easier to spread. Working quickly, spread the marshmallow creme evenly over the top of the cake, pressing it into the holes as you go. The warmth will help it sink into the cake.

Step 4: Prepare and Add the Chocolate Frosting

In a microwave-safe bowl, combine the 1 cup Semi-Sweet Chocolate Chips and 0.5 cup Heavy Cream. Microwave in 20-second bursts, stirring between each, until the mixture is smooth and fully melted. This should take about 1-1.5 minutes total.

Let the chocolate mixture cool for 2-3 minutes, then whisk in the 1 cup Powdered Sugar until smooth. Pour this frosting evenly over the marshmallow layer, allowing it to drip into the holes. The frosting should set slightly but remain gooey.

Step 5: Chill and Serve

Refrigerate the cake for at least 2 hours to allow the layers to set. This chilling time ensures clean slices and enhances the texture contrast between the cake, marshmallow, and frosting.

Serve chilled or at room temperature. The cake should have distinct layers of moist chocolate base, gooey marshmallow, and rich chocolate frosting. Each bite will deliver that decadent, layered experience.

Make-Ahead Tips for Leftovers

Overnight Preparation

The cake base can be baked 1 day ahead and stored at room temperature, wrapped tightly in plastic. This actually improves the texture for poking, as the cake firms up slightly overnight.

Marshmallow Layer Timing

I recommend poking and adding the marshmallow creme the morning of serving. Warm the 1 jar Marshmallow Creme for 15-20 seconds to soften before spreading. The holes will absorb it better when the cake is slightly stale from overnight storage. 💡

Frosting Make-Ahead

The chocolate frosting can be prepared 2 days in advance and refrigerated. Reheat gently in the microwave at 50% power in 10-second bursts, stirring between each, until pourable. Don’t overheat or it will seize.

Fully Assembled Storage

Once fully assembled, this dessert keeps beautifully in the fridge for up to 3 days in an airtight container. The flavors meld and the textures become even more luscious with time.

Room Temperature Service

For the best texture, pull the cake out of the fridge 30 minutes before serving. This softens the frosting slightly while keeping the marshmallow gooey. The contrast is absolutely perfect at this temperature.

Freezing Option

You can freeze the fully assembled cake for up to 1 month. Wrap tightly in plastic and foil to prevent freezer burn. Thaw overnight in the fridge before serving. ❄️

Frequently Asked Questions