INGREDIENTS
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for the vanilla whoopie pies: 2-1/4 cups all purpose flour 1-1/2 tsp baking powder 1/2 tsp salt 4 tbsp unsalted butter, at room temperature 4 tbsp vegetable shortening (i.e. Crisco) 1/2 cup granulated sugar 1/2 cup light brown sugar 2 large eggs, at