INGREDIENTS
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1/2 cup butter (1 stick)
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1/2 cup cane or granulated sugar
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1/4 cup brown sugar
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1/2 tsp vanilla
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1 cup flour
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3/4 cup old-fashioned whole rolled oats
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Pinch of salt
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8-10 ounces blackberry jam (I used roughly half of a 16 ounce jar, maybe a smidgen more)