Name: Hot Chocolate Pudding Cake With Marshmallows
Prep time: 5 min
Cook time: 30 min
Yield: 6 servings

Why This Recipe Works

One-bowl batter: No mixer needed—whisk, pour hot water, and the oven does the magic.
Self-saucing: A generous sprinkle of cocoa-sugar creates a glossy river of pudding underneath.
Toasted marshmallow top: Broil for 90 seconds for campfire flavour without leaving the kitchen.
Make-ahead friendly: Batter can rest covered in the fridge for 24 hours; add water just before baking.
Gluten-free option: Swap in a 1:1 GF flour blend with xanthan; results are equally fudgy.
Individual servings: Divide among six 6-oz ramekins for dinner-party elegance.
Pantry staples only: No fancy chocolate bars—just cocoa powder, milk, and pantry basics.

Ingredients You'll Need

The secret to depth of flavour lies in using both natural cocoa powder for sharp chocolate notes and a teaspoon of espresso powder to amplify them without tasting coffee. Buy fresh, moist brown sugar—if it’s rock-hard, microwave 20 seconds with a damp paper towel over the bowl. Whole milk gives the richest pudding, but 2 % works; skim will curdle. For marshmallows, buy the mini ones—they toast evenly and melt into the cracks. If you only have large campfire marshmallows, snip them into thirds with kitchen shears dusted with cornstarch to prevent sticking. Dutch-process cocoa will mute the tangy lift we want, so stick to natural. Finally, use a light-coloured metal or ceramic baking dish; dark pans over-brown the edges before the centre bakes through.

How to Make Hot Chocolate Pudding Cake With Marshmallows

Preheat & prep pan

Position rack in centre of oven and preheat to 350 °F (175 °C). Lightly butter a 9-inch square pan or six 6-oz ramekins. Dust with granulated sugar; tap out excess. This micro-thin sugar layer helps the marshmallows grip later.

Whisk dry ingredients

In a large bowl whisk ¾ cup (150 g) brown sugar, ½ cup (42 g) natural cocoa powder, 1 cup (125 g) all-purpose flour, 2 tsp baking powder, ½ tsp salt, and 1 tsp espresso powder until no streaks remain. Make a well in centre.

Add wet ingredients

Pour in ¾ cup (180 ml) whole milk, 4 Tbsp melted butter, 1 tsp vanilla, and 1 large egg yolk (the yolk adds extra richness). Whisk just until smooth; a few tiny lumps are fine. Batter will be thick like brownie batter.

Spread & top with magic mixture

Spread batter evenly in prepared pan. In a small bowl combine remaining ½ cup (100 g) brown sugar and ¼ cup (21 g) cocoa with a pinch of salt; sprinkle this evenly over batter. Do not stir—this becomes the pudding layer.

Pour hot water—trust the process

Heat 1 ¼ cups (300 ml) water until steaming; gently pour it over the back of a spoon onto the cocoa-sugar layer. The surface will look like a chocolate lake. Resist poking or stirring; the cake rises while the sauce forms below.

Bake until puffed & bubbling

Bake 28–32 minutes (22–25 for ramekins) until the cake has risen, the top is set with a few moist crumbs, and you see thick chocolate sauce bubbling up around edges. A toothpick inserted into cake (not pudding) should come out with a few moist crumbs.

Remove pan from oven; heat broiler to high. Scatter 1 ½ cups mini marshmallows evenly over hot cake. Broil 6 inches from element for 60–90 seconds until tops are golden—watch constantly; they burn fast. Rotate pan once for even browning.

Cool slightly & serve

Let stand 10 minutes; pudding thickens as it cools. Scoop into bowls, ensuring each serving gets cake, sauce, and toasted marshmallow. Drizzle with cold heavy cream or a scoop of vanilla ice cream for temperature contrast.

Expert Tips

Water temperature matters

Use water that is just off the boil (200 °F) to jump-start the sauce; cold water yields a thin, grainy pudding.

Overnight batter hack

Mix batter, cover tightly, refrigerate up to 24 h. Let sit at room temp 20 min before topping with cocoa and water.

Prevent marshmallow stick

Lightly mist marshmallows with cooking spray before broiling; they brown more evenly and won’t weld to the pan.

Double the pudding

For extra saucy results, increase hot water to 1 ½ cups and bake an extra 3–4 minutes until just set.

Serveware secret

Warm ceramic bowls in a low oven for 2 min; hot pudding won’t seize when it hits cold china.

Kitchen torch option

No broiler? Use a culinary torch in slow circles 2 inches above marshmallows until amber spots appear.

Variations to Try

Storage Tips

Cool leftovers completely, cover pan tightly with foil, and refrigerate up to 3 days. The pudding will thicken to fudgy sauce; reheat individual portions in microwave 25–30 seconds until warm and saucy again. For longer storage, spoon cooled cake and sauce into freezer-safe containers, leaving ½ inch headspace; freeze up to 2 months. Thaw overnight in fridge, then reheat as above. Note: marshmallows will weep slightly upon thawing; you can refresh under broiler for 30 seconds before serving. Do not leave at room temperature more than 2 hours—the dairy-rich pudding invites spoilage.

Frequently Asked Questions

Yes—halve all ingredients and bake in an 8-inch loaf pan or four 4-oz ramekins. Start checking doneness at 20 minutes.

Opening the oven too early or under-baking causes collapse. Bake until cake springs back lightly when touched near centre.

Natural cocoa’s acid reacts with baking powder for lift. If subbing Dutch, add ½ tsp lemon juice or cream of tartar.

Yes—reheat portions in microwave 20 seconds or oven 300 °F for 8 minutes; marshmallows re-toast without burning.

Unsweetened almond milk works, but the pudding will be thinner. Stir 1 tsp cornstarch into the milk for body.

Look for cake pulling slightly from sides, matte top with a few moist crumbs, and sauce visibly bubbling up around edges.

Hot Chocolate Pudding Cake With Marshmallows

Why This Recipe Works

Ingredients You'll Need