INGREDIENTS
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For the crumb topping
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1 cup flour
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1 cup rooled oats
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1 cup brown sugar
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1/4 tsp baking powder
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1/4 tsp ground cinnamon
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dash of salt
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1/2 cup unsalted butter, diced into small chunks
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For the Apple filling
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4 large Granny Smith apples, peeled and sliced thin
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4 Tbsp butter, melted
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2 Tbsp flour
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1 Tbsp lemon juice
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3 Tbsp milk
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1 tsp vanilla extract
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1 cup brown sugar
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1 tsp ground cinnamon
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dash of salt