2009 Cost: $2.69Milk, at $2.86 a gallon was the biggest contributor to the lower cost of this year’s meal. The price fell 92 cents from a year ago. But the cost of other items fell as well. A half pint of cream will cost $1.55 this year, compared with $1.70 a year ago. The average cost of miscellaneous ingredients such as onions, eggs, sugar, flour, butter and coffee fell 19 cents to $2.50 from $2.69 a year ago.