Welcome to a detailed description of the stats of food. The food will be ranked in the amount of hunger it refills.

Meat

Raw Pork - 1 and a 1/2

Raw Beef - 1 and a 1/2

Raw Fish - 1

Raw Chicken - 1

Cooked Pork - 4

Cooked Beef - 3 and a 1/2

Cooked Fish - 2 and a 1/2

Cooked chicken - 3

Rotten Flesh - 1 and a 1/2 + high chance of poison

Flour Based Food

Bread - 2 and a 1/2

Cake (Slice) - 1

Cake (Full) - 6

Cookies - 1/2

Fruits

Apple - 1 and a 1/2

Watermelon Slice - 1

Other

Golden Apple - 2 + health regeneration

Mushroom Stew - 4

That is the stats of all the available foods in 1.2.5.
Hope this has helped you in some random way :)