Marshmallow Chocolate Poke Cake Recipe: Decadent Layers of Gooey Bliss

This chocolate poke cake takes dessert to a new level with layers of rich, moist cake and gooey marshmallow filling. The secret is in the strategic poking and pouring that creates pockets of sweetness in every bite.

I developed this recipe to combine the comfort of homemade cake with the fun of a s’mores-inspired treat. The chocolate base stays tender while the marshmallow topping develops a perfect golden finish under the broiler.

What you get is a showstopping dessert that serves a crowd with minimal effort. The contrast of warm, melty marshmallows against the cool, fudgy cake makes this irresistible.

Ideal for potlucks, birthdays, or when you need to satisfy a serious chocolate craving. The technique ensures every slice has the perfect balance of textures.

Ingredients for Marshmallow Chocolate Poke Cake

Rich, moist cake meets melty marshmallow magic. Probably have most of this already.

The cocoa powder is non-negotiable here—Dutch-process from Hershey’s or Ghirardelli gives that deep, dark color and flavor. Buttermilk might require a special trip, but it’s worth it (or make your own with milk and vinegar). King Arthur flour is my go-to for baking, but any all-purpose works. For the marshmallows, Jet-Puffed or Kraft mini ones melt perfectly without turning grainy.

No buttermilk? Milk plus 1 tbsp vinegar works in a pinch. Out of Dutch-process cocoa? Regular unsweetened cocoa is fine, but add a pinch of baking soda to compensate. Swap chocolate chips for chopped bars if that’s what you’ve got. The sweetened condensed milk can be Carnation or Eagle Brand—both are solid. Skip the mini marshmallows? Regular ones work, just chop them smaller.

Leftovers keep 3-4 days in an airtight container at room temp. The cake actually tastes better the next day once everything settles. For longer storage, wrap slices tightly and freeze for up to 3 months.

Step-by-Step Instructions for Marshmallow Chocolate Poke Cake

Here’s how I create this decadent dessert with rich layers everyone loves.

Step 1: Mix and Bake the Chocolate Cake Base

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

In another bowl, beat the 2 whole Large Eggs, 1 cup Buttermilk, 0.5 cup Vegetable Oil, and 2 tsp Vanilla Extract. Gradually add the dry ingredients, mixing just until smooth. Stir in the 1 cup Hot Water—the batter will be thin, but that’s normal for this cake.

Pour the batter into the prepared pan and bake for 25-30 minutes, or until a toothpick inserted in the center comes out clean. Let the cake cool for 10 minutes before moving to the next step.

Step 2: Poke and Fill with Sweetened Condensed Milk

While the cake is still warm, use the handle of a wooden spoon to poke holes all over the surface. Make sure the holes are deep but don’t go all the way through the cake—you want the filling to seep in and soak the layers without leaking out.

Slowly pour the 1 can Sweetened Condensed Milk evenly over the cake, letting it fill each hole. The cake will absorb most of the liquid as it cools, creating a moist, rich base. Let it sit for 15 minutes to soak in completely.

Step 3: Add the Marshmallow Layer

Once the cake has absorbed the condensed milk, sprinkle all 4 cups Mini Marshmallows evenly over the top. Press them down lightly so they stick to the cake’s surface. This ensures they stay in place when you add the chocolate layer.

Place the pan under the broiler for 1-2 minutes, watching closely to avoid burning. You want the marshmallows to toast just enough to turn golden brown on top. Remove from the oven as soon as they’re lightly browned.

Step 4: Melt Chocolate Chips for the Final Layer

Sprinkle all 1.5 cups Semi-Sweet Chocolate Chips evenly over the toasted marshmallows. Return the pan to the oven for 2-3 minutes, just long enough for the chocolate chips to soften. Use a spatula to gently spread the melted chocolate into an even layer over the marshmallows.

Let the cake cool completely before slicing. The chocolate will set as it cools, creating a glossy, decadent topping. Serve at room temperature for the best texture—warm enough to be gooey but cool enough to hold its shape.

Storing and Reheating This Recipe

Room Temperature Storage

Let the cake cool completely before storing. Cover with plastic wrap or place in an airtight container at room temperature. It stays fresh for 3-4 days—the flavors actually deepen as the cake rests. 💡

Refrigerator Storage

For longer freshness, refrigerate in an airtight container for up to 1 week. Let slices come to room temperature for 30 minutes before serving to restore the gooey texture of the marshmallows.

Freezing Instructions

Wrap individual slices tightly in plastic wrap and place in a freezer-safe bag. Freeze for up to 3 months. Thaw overnight in the refrigerator before bringing to room temperature. ❄️

Reheating Slices

For warm, melty marshmallows, microwave a slice for 15-20 seconds on 50% power. Alternatively, place on a baking sheet in a 300°F oven for 5-10 minutes until warmed through.

Serving Warm

If reheating the entire cake, cover with foil and warm in a 300°F oven for 10-15 minutes. Remove foil for the last 2 minutes to refresh the chocolate topping’s shine.

Frequently Asked Questions