"An easy way to use up extra rhubarb, this rhubarb coffee cake is the perfect..."
INGREDIENTS
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1/2 cup dark brown sugar, packed
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1/4 cup all-purpose flour
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1 teaspoon cinnamon
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3 tablespoons cold butter
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1/2 cup butter, softened
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1 and 1/2 cups granulated sugar
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2 eggs, room temperature
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1 cup plain Greek yogurt (or sour cream)
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1 teaspoon vanilla
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2 cups all-purpose flour
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1 teaspoon baking soda
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2 cups rhubarb, finely diced