"This cake has a crumb "topping" that actually ends up on the bottom. Each bite has a surprisingly crunchy texture...."
INGREDIENTS
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4 unsalted butter
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1/2 all-purpose flour
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1/4 sugar
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Coarse salt
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1.5 unsalted butter
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1 rhubarb
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1.75 sugar
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1.5 all-purpose flour
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1.5 baking powder
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Coarse salt
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1/2 finely grated orange zest
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1 fresh orange juice
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2 eggs
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1 sour cream