"Monster cookies baked into bar cookies - peanut butter dough loaded with oats, chocolate chips and M&M's...."
INGREDIENTS
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½ cup unsalted butter (at room temperature)
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1 cup light brown sugar
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½ cup creamy peanut butter
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1 egg
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2 teaspoons vanilla extract
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¾ cup all-purpose flour
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1 teaspoon baking soda
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1 teaspoon cornstarch
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¼ teaspoon baking powder
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¼ teaspoon salt
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1½ cups old-fashioned oats
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1 cup semisweet chocolate chips
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1 cup M&M's + additional for top of bars