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										Preheat oven to 350. 
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										Cream butter and sugars together. 
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										Add in egg. Beat until fluffy. 
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										Add in milk, vanilla and root beer concentrate. 
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										Add in flour, cream of tartar, baking soda. If dough seems a bit dry add it a little more milk, but just a little. 
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										Mix in chips 
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										Bake on an ungreased cookie sheet for 10 minutes. Remove from oven and let cool for about 5 minutes and then move to a wire rack.