"Nutella Sour Cream Crumb cake has a big crumb topping and a layer of creamy Nutella running through the center of the cake. It's a fab New York crumb cake!..."
INGREDIENTS
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⅓ cup (71 g) granulated sugar
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⅓ cup (61 g) packed dark brown sugar
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¾ tsp ground cinnamon
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⅛ tsp table salt
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8 tbsp (4 oz or 113 g) unsalted butter, melted and still warm
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1 ¾ cups (200 g) cake flour
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Scant ⅓ cup full-fat sour cream
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2 tbsp milk
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1 ¼ cups (145 g) cake flour
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½ cup (100 g) granulated sugar
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¼ tsp baking soda
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¼ tsp table salt
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6 tbsp (3 oz or 85 g) unsalted butter, cut into 3 pieces, softened but still cool
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1 large egg
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1 large egg yolk
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1 tsp pure vanilla extract
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½ cup (173 g) Nutella or other chocolate hazelnut spread
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Confectioners’ sugar, for dusting