This cake is one of those recipes I reach for when I want something reliably decadent without fuss. It comes out rich, deeply chocolatey and surprisingly elegant for the amount of hands-on time it needs. The Instant Pot gives it a silky, custardy texture that a conventional oven struggles to match for a flourless cake.

I wrote this recipe after several kitchen tests to get the timing and the little details right — like greasing the pan just enough, and using a foil cover so the cake steams instead of drying out. The result is a dense, fudgy cake with a thin, slightly cracked top and a tender center that holds together when sliced.

Follow the steps closely and you’ll have a showstopping dessert for guests or a simple, indulgent night in. Serve it warm with a dusting of Dutch-processed cocoa powder or chilled with a spoonful of crème fraîche or lightly whipped cream.

What We’re Using

Before you start, gather the ingredients and tools. This cake relies on good chocolate, room-temperature eggs, and the pressure-cooking environment of the Instant Pot to set without flour. Read through the steps once so you’re not scrambling with hot bowls or foil while the cake cooks.

Ingredients

15 tablespoons unsalted butter — melts with chocolate to create the cake’s rich fat base and glossy crumb.
1 1/2 cups semisweet chocolate chips or bittersweet — main chocolate flavor; choose good quality for best results.
4 tablespoons unsweetened Dutch-processed cocoa powder plus more for garnish — deepens chocolate flavor and gives a dry, cocoa dust finish.
1/2 teaspoon fine sea salt — balances sweetness and rounds the chocolate notes.
1/2 cup white granulated sugar — adds sweetness and helps set the cake’s texture.
1 cup light brown sugar — brings a touch of molasses complexity and keeps the cake moist.
2 tablespoons strong coffee-like liquid espresso (not espresso powder) — amplifies chocolate flavor; use brewed espresso or very strong coffee.
2 teaspoons pure vanilla extract — lifts and rounds the chocolate tones.
6 large eggs at room temperature — provide structure and richness; room temperature helps them incorporate evenly.

From Start to Finish: Instant Pot Flourless Chocolate Cake

Pour 1 1/2 cups of water into the Instant Pot insert and place the trivet inside.
Line a 7-inch springform pan with a parchment paper round. Grease the sides and the parchment-lined bottom lightly with some of the unsalted butter.
In a medium microwave-safe bowl, combine 15 tablespoons unsalted butter, 1 1/2 cups semisweet or bittersweet chocolate chips, and 4 tablespoons unsweetened Dutch-processed cocoa powder.
Microwave the chocolate–butter mixture on high in 30-second intervals, whisking well after each interval, until fully melted and smooth.
Add 1/2 teaspoon fine sea salt, 1/2 cup white granulated sugar, and 1 cup light brown sugar to the warm chocolate mixture and whisk until combined.
Stir in 2 tablespoons strong coffee-like liquid espresso and 2 teaspoons pure vanilla extract.
Add the 6 large room-temperature eggs to the chocolate mixture one at a time, whisking after each addition until the batter is smooth and homogeneous.
Pour the batter into the prepared springform pan and gently tap the pan on the counter a few times to release any large air bubbles.
Cover the pan tightly with aluminum foil. Place the covered pan on the trivet in the Instant Pot.
Close and lock the lid, set the pressure release valve to SEALING, select Manual (High Pressure), and set the cooking time to 50 minutes.
When the cooking time ends, let the pressure release naturally for 10 minutes, then carefully move the valve to VENTING to release any remaining pressure. When the float valve drops, open the lid.
Using oven mitts or a dish towel, carefully remove the covered pan from the pot. Remove the foil and check the center: if it jiggles just slightly, it is done; if the center is liquidy, re-cover the pan with foil, return it to the trivet in the Instant Pot, reseal, and cook an additional 5 to 10 minutes on high pressure, then perform a 10-minute natural release before quick-releasing any remaining pressure and checking again.
Let the cake cool to room temperature on the counter (about 2 hours). Run a thin long knife around the edge of the cake and release the springform sides.
Refrigerate the cake if desired or serve warm. Just before serving, dust the top with additional Dutch-processed cocoa powder.

Why This Recipe is a Keeper

Flourless chocolate cake should be simple: concentrated chocolate flavor, smooth texture, and minimal fuss. This Instant Pot method steams the cake gently, preventing the cracked, dry tops that sometimes happen in the oven. The dual use of granulated and brown sugar produces a clean sweetness with depth, and the espresso—used as liquid—pushes the chocolate notes forward rather than making the cake taste like coffee.

This is a dependable recipe for dinner parties because it can be made ahead and plated a few different ways. It’s rich enough that a small slice satisfies, and versatile enough to pair with cream, fruit, or a nutty garnish.

International Equivalents

If you prefer metric measurements or are cooking outside the U.S., here are approximate conversions. These are rounded for practical kitchen use.

15 tablespoons unsalted butter — about 213 grams.
1 1/2 cups semisweet chocolate chips — roughly 255–270 grams, depending on chip size.
4 tablespoons Dutch-processed cocoa powder — about 24 grams; plus extra for dusting.
1/2 teaspoon fine sea salt — about 3 grams.
1/2 cup white granulated sugar — about 100 grams.
1 cup light brown sugar — about 220 grams (packed).
2 tablespoons liquid espresso — about 30 milliliters.
2 teaspoons vanilla extract — about 10 milliliters.
6 large eggs — use large eggs as labeled; weight varies by country, but room temperature is key.

Toolbox for This Recipe

Electric pressure cooker / Instant Pot with a trivet.
7-inch springform pan — fits inside most 6- or 8-quart Instant Pots when the trivet is used.
Parchment paper round and oil or butter for greasing.
Medium microwave-safe bowl or double boiler for melting chocolate and butter.
Whisk and a rubber spatula for smooth batter.
Aluminum foil to cover the pan during pressure cooking.
Oven mitts or thick dish towel for safe removal.

Steer Clear of These

Little mistakes can change the cake’s texture. Avoid these common missteps:

Do not substitute espresso powder for liquid espresso. The recipe specifies a coffee-like liquid to deepen chocolate flavor without drying the batter.
Don’t skip room-temperature eggs. Cold eggs can lead to uneven mixing and a denser texture.
Make sure the foil cover is tight. Steam escaping into the cake will cause the top to dry and crack more than desired.
Resist opening the Instant Pot immediately at the end of cook time — follow the 10-minute natural release first to avoid sudden temperature shock.
Avoid using a pan much larger than 7 inches; the batter will be too thin and cook differently under pressure.

Fresh Takes Through the Year

This cake adapts well to small seasonal tweaks without changing the base ingredients.

Fall: Serve with a dollop of lightly spiced whipped cream (a pinch of cinnamon or cardamom) and toasted walnuts.
Winter holidays: Offer orange segments or a spoonful of warmed cranberry compote for bright acidity against the chocolate.
Spring: Fresh berries (strawberries, raspberries) cut the richness and add freshness.
Summer: Keep it chilled and serve with vanilla ice cream or mascarpone for contrast.

Chef’s Notes

Here are the practical details I’ve learned from multiple runs in my kitchen.

Melting the chocolate

Microwaving in 30-second bursts and whisking between each burst prevents overheating and seizing. If you prefer, use a double boiler over simmering water and stir until smooth.

Checking doneness

The center should jiggle slightly, not be liquid. Because the Instant Pot’s heat is moist and consistent, it’s normal for this cake to be more custard-like than dry. If it’s liquid, follow the instruction to re-cover and add 5–10 minutes of pressure cooking and then a 10-minute natural release.

Serving

You can serve it warm for a molten, soft center or chilled for firmer slices. Dust with extra Dutch-processed cocoa powder right before serving for a clean, elegant look.

Keep-It-Fresh Plan

Storage is straightforward:

Refrigerate: Store the cake in the fridge, covered, for up to 5 days. It firms slightly and slices more cleanly.
Freeze: You can freeze whole or portioned slices, tightly wrapped, for up to 2 months. Thaw in the fridge overnight and bring to room temperature before serving or warm briefly.
Make-ahead: The cake can be made a day in advance. Dust cocoa powder and add fresh garnishes just before serving.

Reader Questions

Q: Can I bake this in the oven?
A: Yes. If you prefer the oven, preheat to 325°F (160°C) and bake the batter in the same prepared 7-inch pan for about 35–45 minutes, checking for a slight jiggle in the center. Oven times vary, so watch closely after 30 minutes.

Q: Is this cake gluten-free?
A: Yes. This recipe contains no flour and is naturally gluten-free. Always check your chocolate and cocoa label if you need a certified gluten-free product.

Q: My top cracked — what happened?
A: Slight cracking is normal for flourless cakes, but excessive cracking often means the foil wasn’t tight or the cake was overcooked. Make sure to cover well and follow the cook time and release instructions.

Q: Can I halve the recipe?
A: This recipe is tuned for a 7-inch springform pan. Halving might work in a smaller pan, but cooking time will change and you may need to experiment with pressure time and natural release. I don’t recommend halving unless you’re experienced with scaling pressure-cooked recipes.

The Last Word

This Instant Pot flourless chocolate cake is one of those dependable recipes that feels special without making you sweat. It’s rich, deeply chocolatey and flexible — serve it warm, chilled, plain or dressed up. Follow the steps, keep your ingredients ready, and you’ll walk away with a dessert that impresses every time.

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