The homecooked meal if items are purchased in bulk and on sale. Added bonus: you can cook more than you need and freeze it for future meals. But admittedly, one would have to get off their drive-thru butt and actually 'do it themselves'.
No need to buy in bulk. Dinner for 6:
Ground Chuck: $3.50
Corn on the Cob: $3.00
Hamburger Buns: $2.50
Gallon of Milk: $3.00
Total: $12.00 or $2 per person. Plus we'll have enough milk for breakfast tomorrow.
No need to but . . . if you purchase the product when it is at it's lowest price (and utilize coupons at this time), buy the family pack size rather than the smaller size, buy a few more than what you will need/use/eat in a week and freeze it/store it, you will then have the product when you need it at a lower cost. Do this on a consistent basis and you will never pay full price for items again.
As an example . . . Eight O'Clock coffee here is $5.99/12 oz bag. I gather coupons (usually $2 off of two bags coupon) and wait until the coffee goes on a BOGO sale then purchase enough to last us four months, which is how often they put this coffee on a BOGO sale.
Full price for 16 bags: $95.84
BOGO sale plus coupons price: $31.92 (BOGO price = $47.92 minus another $16 in coupons)
Savings: $63.92 or 67% or $1.99/bag vs. $5.99 bag!
Either way I'm going to be spending money on coffee; shopping sales/coupons/bulk saves money. The bulk doesn't have to be massive, just enough to last until the next time the product goes on sale.
You can shop the sales week to week but if you purchase a bit in bulk it will last longer and save you time/money in the long run. The more you do it the easier it becomes.