Homemade Oreos

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Ingredients

1¼ cups (155 grams) all-purpose flour
½ cup (45 grams, but cocoa weights can vary greatly) unsweetened Dutch process cocoa
1 teaspoon baking soda
¼ teaspoon baking powder
½ teaspoon kosher salt
1 to 1¼ cups (200 to 250 grams) sugar [see Note]
10 tablespoons (5 ounces or 140 grams) unsalted butter at room temperature*
1 large egg
¼ cup (4 tablespoons or 55 grams) unsalted butter at room temperature*
¼ cup (50 grams) vegetable shortening (or you can swap with additional butter, see Note)
2 cups (240 grams) sifted confectioners’ sugar
2 teaspoons (10 ml) vanilla extract
Two pinches of salt

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