There's no single answer. A simple pasta dish might cost under a pound per serving; a roast with good-quality meat might cost several times that. Prices also vary by shop, brand, region and season.
The reliable way to know is to cost your recipe with your prices. Add your ingredients to the food cost calculator and set the number of servings.
What pushes the cost up or down
- Protein: usually the most expensive part of a meal.
- Brand vs own-label: often a big difference for staples.
- Waste: food that's thrown away still costs money.
- Batch size: cooking more at once often lowers the per-serving cost.