INGREDIENTS
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230g butter (room temperature)
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230g caster sugar
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230g light brown sugar
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8 medium eggs (room temperature)
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340g self-raising flour
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100g cocoa powder
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2 teaspoons bicarbonate of soda
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generous pinch of salt
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10 tablespoons creme fraiche (or sour cream)
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2 teaspoons good vanilla extract
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Decor:
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Three 4.5-ounce Giant Kit Kat Bars (you'll need 36 Kit Kat sticks total)
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Ribbon