INGREDIENTS
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For the Cake
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1 box of yellow cake mix (NOT pudding type)
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3 eggs
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1 1/3 cup water
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1 tablespoon vanilla
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For the crumb topping
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1 pound of softened butter (4 sticks)
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4 cups flour
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1 1/3 cup sugar
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3 tsp vanilla
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3 tsp cinnamon
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Pinch of salt