A cheese poğaça comes out of the oven with the cheese melted inside, yet there is no pool of cheese on the tray. That has less to do with sealing the dough than with the structure of the filling.
What does cheese do in the oven?
Heated cheese passes through two stages.
First the milk fat melts, liquefying at 32 to 35 degrees.
Then the casein network loosens; the bonds begin dissolving at 55 to 65 degrees.
Once the network dissolves fully the cheese becomes fluid.
But being fluid is not the same as flowing.
Flowing requires both fluidity and a route to travel.
Poğaça dough blocks that route; but dough is porous for a period during baking too.
What really decides it is how fluid the cheese becomes.
High-moisture cheese is watery and fluid; low-moisture cheese largely holds its consistency even melted.
Why is water-holding capacity decisive?
Water in a filling exists in two states.
Free water is mobile; heated, it evaporates or runs.
Bound water is attached to protein and starch and does not move easily.
How much of the water is bound determines the flow behaviour.
Curd cheese has a high water-holding capacity; its casein structure is loose and traps water.
Fresh mozzarella is the opposite; its water is free and runs out when cut.
A mixture of curd and white cheese is therefore preferred in poğaça filling.
Drying agents added to the mixture bind water too.
Together those two mechanisms hold the cheese where it melts.
| Cheese | Moisture | Melting behaviour | In poğaça |
|---|---|---|---|
| Curd cheese | 60-70% | Does not melt, crumbles | Very suitable |
| White cheese (aged) | 50-55% | Softens, does not run | Very suitable |
| White cheese (fresh) | 58-62% | Releases water | Needs draining |
| Kaşar | 40-45% | Melts fully, runs | In limited proportion |
| Fresh mozzarella | 55-60% | Releases water, runs | Unsuitable |
| Tulum | 35-40% | Softens | Suitable, salty |
Which cheese should be chosen?
The filling is not made with one cheese; a blend is required.
Curd cheese serves as the base; it holds water and gives the filling volume.
But its flavour is weak; used alone the filling tastes of nothing.
White cheese provides flavour and partial binding.
Aged white cheese should be preferred; fresh cheese carries too much water.
Kaşar melts and adds flow; its proportion should stay low.
It should not exceed 10 to 20 percent of the filling.
A typical blend: 50 percent curd, 35 percent white cheese, 15 percent kaşar.
That ratio delivers flavour, texture and control of flow together.
The cheeses should be crumbled beforehand; large pieces leave voids in the filling.
What do drying agents do?
A small quantity of dry ingredient goes into the filling.
Breadcrumbs are the commonest; they absorb water and bind the filling.
Three to six percent of the filling weight suffices.
Semolina is used too; coarser and holding more water.
Mashed potato is another option, holding water while softening the texture.
Starch can be used but too much gives the filling a pasty texture.
These components go in after the filling is mixed and it then rests ten minutes.
That rest is needed for the water to be absorbed.
In a filling used immediately the drying agent has not yet taken up the water.
Too much drying agent makes the filling dry and bland; the balance matters.
How are salt and moisture balanced?
Salt draws water out of cheese.
A salty filling releases water while standing.
The filling should therefore be used immediately after mixing, or drained.
White cheese is salty already; added salt is generally unnecessary.
Where it is too salty, the cheese can be soaked to remove salt, then drained thoroughly.
Herbs such as parsley and dill bring water too.
They should be finely chopped and patted dry.
Egg is used as a binder in some recipes; it coagulates during baking and holds the filling together.
But too much egg firms the filling and gives it an omelette-like texture.
One egg per kilogram of filling suffices.
How should it be sealed and baked?
The filling should be 25 to 35 percent of the dough weight.
Too much makes sealing difficult and it escapes at the seam.
The filling goes at the centre with two centimetres left clear at the edges.
The edges are pressed together with the fingers.
Dough merely folded over opens during baking.
They go on the tray seam-side down.
Three centimetres should be left between them.
The oven temperature is 180 to 190 degrees.
At high heat the dough sets quickly while the cheese has not yet melted; the inside stays cold.
At low heat the dough sets late and the cheese has time to flow.
Baking runs twenty-five to thirty-five minutes.
What changes when poğaça is frozen?
Cheese poğaça suits raw frozen production.
But water in the filling forms crystals during freezing.
That water is released on thawing and the filling turns wet.
The filling should therefore be prepared drier for frozen production.
The proportion of drying agent rises to 6 to 8 percent.
The proportion of curd cheese rises too, for its water-holding capacity.
Blast freezing should be used; in rapid freezing the crystals stay small and damage falls.
Frozen poğaça goes into the oven without thawing.
The temperature is unchanged; the time is extended by five to ten minutes.
In a thawed product both dough and filling release water and the product is spoiled.
The egg wash goes on immediately before baking.
The shelf life is three months; beyond that the filling loses texture and the dough dries.
