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Ingredients
- 3 tablespoons unsalted butter, plus more for cake pan
- 6 ounces bittersweet chocolate, preferably 70 percent cacao, chopped
- 6 large eggs, separated, room temperature
- 1 cup sugar, divided
- 3 tablespoons instant-espresso powder
- 1/4 teaspoon coarse salt
- 1 tablespoon pure vanilla extract
- Chocolate Glaze
- Ingredients
- 3 ounces bittersweet chocolate, preferably 70 percent cacao, chopped
- 1 1/2 tablespoons unsalted butter
- 2 teaspoons pure vanilla extract
- 1/3 cup heavy cream
- 1/3 cup sugar
- 1 tablespoon instant-espresso powder
- 1/4 teaspoon coarse salt
Details
Servings 1
Preparation time 20mins
Cooking time 90mins
Adapted from marthastewart.com
Preparation
Step 1
Step 1
Preheat oven to 350 degrees. Invert bottom of a 9-inch springform pan (so cake will slide easily onto serving plate) and line with a parchment round; butter parchment. Melt butter and chocolate, stirring until smooth, in a bowl set over a saucepan of simmering water.
Step 2
Beat together egg yolks and 1/2 cup sugar with a mixer on medium-high speed until thick and pale, about 3 minutes. Add espresso powder and salt; beat until combined, about 1 minute. Add vanilla and melted-chocolate mixture; beat about 1 minute more.
Step 3
In another bowl, beat egg whites on medium-high speed until foamy. Increase speed to high; gradually add remaining 1/2 cup sugar, beating until stiff peaks form, about 5 minutes. Fold into chocolate mixture in 3 batches. Transfer batter to pan and bake until set, 40 to 45 minutes. Let cake cool completely in pan on a wire rack. Remove side of pan; transfer cake to a serving plate.
Serve glaze alongside cake.
Chocolate Glaze
Combine chocolate, butter, and vanilla in a bowl. Bring cream, sugar, espresso powder, and salt to a boil in a small saucepan, stirring until sugar and espresso powder are dissolved. Pour over chocolate mixture and whisk until smooth.
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