INGREDIENTS
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1/2 cup (1 stick) unsalted butter, softened
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1 cup sugar
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1/4 teaspoon baking powder
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1/4 teaspoon baking soda
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1/4 teaspoon salt
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1 egg, at room temperature
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1 1/2 teaspoons vanilla
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1/2 cup unsweetened cocoa powder
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1 1/2 cups flour, spooned and leveled
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1 cup semisweet chocolate chips
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1/2 cup (about half a can) sweetened condensed milk
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1-2 teaspoons creamy peanut butter
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Either 21 or 42 mini Reeses cups (see note)