Instructions

Make sure the oven rack is in the center position and preheat the oven to 350?F.
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Sift the flour, baking powder, baking soda, and salt into a medium mixing bowl. Set aside.
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Place the butter, granulated sugar, and light brown sugar in the bowl of an electric mixer and cream the ingredients on high speed.
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Add the vanilla and egg to the mixer and mix on medium speed.
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Stop the mixer and scrape down the sides of the bowl with a rubber spatula. Add the flour mixture and combine on low speed. Itís important to do this on low or youíll get flour all over the kitchen!
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Stop the mixer and, using a large spoon or rubber spatula, fold in both kinds of M&Mís.
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With a tablespoon, form the dough into balls, using about 2 spoonfuls for each.
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Divide the balls of dough among 3 large baking sheets and press to slightly flatten, keeping the cookies about 2 inches apart. You should get 8 cookies on each sheet.
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Bake in batches in the oven until golden brown, about 20 minutes.
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Using oven mitts or pot holders, remove the cookies from the oven and transfer them with a plastic turner to wire racks to cool.
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Yield: Twenty-four 4-inch cookies