Copycat Morton’s Legendary Hot Chocolate Cake
Morton’s Legendary Hot Chocolate Cake has been on the menu since the steakhouse opened in Chicago in 1978. That longevity is unusual for a dessert: most steakhouse menus rotate seasonal specials and rotate them out. Morton’s never did with this one.
The dish looks like a lava cake but behaves differently. Where most molten chocolate cakes are designed to invert onto a plate — a thin-walled chocolate shell releasing a liquid center — Morton’s version is baked and served in the soufflé cup. The batter is built around ten eggs (five whole, five yolks) and eight ounces of chocolate melted with a full cup of butter. At the restaurant’s price of roughly $18, that’s a straightforward trade of labor and ingredients for the experience of having it arrive tableside. At home, six servings cost about $21 total.
The key technique note: Morton’s uses a double boiler, not the microwave. Slow, gentle melting over barely simmering water produces a smoother emulsion with butter and a batter that cooperates when the eggs go in. Once the batter is made, it fills six buttered, sugar-coated ramekins and goes into a 350°F oven. The goal is 18–20 minutes: puffed above the rim, edges set, center still flowing. Every oven varies — use a timer and start checking at 18. The difference between molten and fully baked is about two minutes.
What Makes It a Morton’s Signature
The recipe comes from Klaus Fritsch, Morton’s co-founder, who included it in their published cookbook — the same source that documents their other never-off-the-menu classic, the three-cheese creamed spinach. Three details set the cake apart from generic molten cakes:
The egg ratio. Most restaurant lava cakes use roughly two whole eggs and two yolks for four servings. Morton’s uses five of each for six — about 1.5x more egg than a standard recipe. The extra yolks add richness; the extra whites provide the lift that makes the surface puff like a soufflé rather than just swell. The interior becomes more pudding-like and less raw.
Served in the ramekin. No inverting, no dramatic reveal of chocolate flowing across the plate. The ramekin goes from oven to service plate; the ice cream and raspberries go on top. It’s a more contained, less theatrical presentation — which is, oddly, part of the appeal for a restaurant that built its brand on substance over style.
Godiva chocolate liqueur. Half a teaspoon across six servings is barely detectable as alcohol. What it does is add a concentrated cocoa-extract note that makes the chocolate flavor rounder. Vanilla extract is a fine substitute if you don’t have it.
The Timing Window
At Morton’s, the line cooks have made this dessert thousands of times and know their oven exactly. At home, your first batch is calibration. A 350°F oven (verified with a thermometer) should produce a molten center at 18–20 minutes. At 18 minutes, tap the side of one ramekin: the edges should be completely still; the center inch should quiver like set gelatin. If the whole surface quivers, give it 2 more minutes. If there’s no quiver anywhere, the center has set — you have a very good chocolate cake, just not a molten one.
Once you know your oven’s number, you can make this ahead: fill the ramekins, cover with plastic wrap, refrigerate for up to 24 hours, and bake cold — adding 3–4 minutes to the time. This is how to handle a dinner party of six without hovering over the oven during dessert.
