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Preheat the oven to 350°F/180°C.
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Generously butter a cake pan, approx 9 inches, or medium-sized bundt pan (4 cup capacity), and dust with a little flour. Shake off any excess flour, set aside.
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In a small bowl whisk together the flour, baking powder and salt. Set aside.
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In a large bowl, whisk the egg yolks, softened salted-butter and chestnut cream until smooth.
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Fold in the flour. Add the bitters and stir together.
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Whisk the egg whites until stiff. You can do this by hand (in a metal or copper bowl) or use a hand held mixer.
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Add 1/3 of the stiffened egg whites to the batter and fold together gently. Add another 1/3 and repeat till smooth. Add the final 1/3 of the egg whites and fold together till smooth.
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Gently fold in the chocolate chips.
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Pour the batter into the prepared cake pan. Place on a baking sheet.
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Bake on the centre rack for approximately 40 minutes, or until the cake is golden. (please note that a Bundt pan will take slightly longer because it is deeper).
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A skewer will come out clean when ready.
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Sprinkle with confectioner’s sugar.
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Garnish with fruit or even glazed chestnuts