"Crumbly on top with a sweet jam surprise inside, these muffins are the perfect hand-held breakfast treat...."
INGREDIENTS
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1.50 all-purpose flour
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1/2 packed dark-brown sugar
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1/2 salt
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3/4 ground cinnamon
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1/2 unsalted butter
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2.00 all-purpose flour
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1 baking powder
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1.00 baking soda
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1/2 coarse salt
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12 unsalted butter
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1 granulated sugar
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2 eggs
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2 egg yolks
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1 pure vanilla extract
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2/3 crème fraîche
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1/4 jam