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1
Place chiles in a bowl with water to cover; let soak until slightly softened, about 15 minutes.
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2
Place 1 1/2 cups dark chocolate and 1 cup plus 2 tablespoons butter in top of a double boiler over simmering water. Stir frequently, scraping down the sides with a rubber spatula to avoid scorching, until chocolate is melted, about 5 minutes. Remove from heat.
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3
Preheat oven to 325 degrees F (165 degrees C). Line a 10-inch springform pan with parchment paper.
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4
Place chiles in a food processor; process until finely chopped. Add almonds, cocoa powder, flour, and cinnamon; process until almonds are chopped. Add Greek yogurt. Mix chile mixture thoroughly into the bowl of melted chocolate to make the batter.
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5
Place egg yolks and egg whites into 2 different bowls. Place 3/4 cup sugar into the bowl of egg yolks; mix until fluffy and creamy. Stir carefully into the batter.
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6
Beat egg whites until foamy using an electric mixer. Add 6 tablespoons sugar gradually, continuing to beat until medium peaks form. Blend meringue carefully into the batter; pour batter into the prepared pan.
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7
Bake until a toothpick inserted into the center comes out mostly clean, 25 to 30 minutes. Let cake cool, at least 20 minutes.
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8
Combine 1 1/2 cups dark chocolate, milk chocolate, and 2 tablespoons butter in a bowl.
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9
Combine 1 cup plus 1 tablespoon heavy cream and 2 tablespoons sugar in a saucepan over medium heat; bring to a boil. Pour over the bowl of chocolate; mix thoroughly. Let ganache cool, at least 15 minutes. Spread over the cake.
