Flour Varieties: Protein Ratio and the Right-Use Guide

There are half a dozen different packets on the flour shelf; in the kitchen we usually pick one at random and use it for all recipes. Yet bread, börek, cake, poğaça, and pasta want different flours. The reason a cake made with the same flour comes out dry, and a bread made with the same flour comes out like rubber, is most often the flour choice. In this article we examine flour varieties by protein ratio, milling degree, and right use.

Why flour is not one thing: the protein matter

Wheat contains two main proteins: glutenin and gliadin. When mixed with water they combine into an elastic, sticky network (gluten); this network gives bread its rise and lets dough hold shape. Different flour varieties have different protein ratios, and this ratio largely decides what that flour "is for".

King Arthur Baking lists protein ratios as follows:

As the protein ratio rises, the dough becomes firmer, more elastic. Low-protein flour gives a softer, more crumbly cake/biscuit. Using the wrong flour is one of the quietest ways to ruin a recipe.

Italian tip numbers (00, 0, 1, 2, integrale)

Italian flours are numbered by milling fineness; a lower number = a finer flour. It intersects with the protein ratio but is a separate scale.

For Pizza Napoletana, Caputo 00 is the standard brand; elastic but fine, crisp surface + airy interior when baked. Pizza made with AP flour does not give the same result.

Flour types in the Türkiye market

White wheat flour (Tip 550 / Tip 650)

The most common flour on the Turkish market shelf. The tip number shows the ash content (in mg per 100 g of flour). Lower tip = more refined, whiter. Protein 10-12%. Used for any purpose; cake, börek, poğaça, pasta, bread. Expert in none but acceptable in all.

Bread flour (Tip 750 / Tip 850)

Contains slightly more bran; protein 12-14%. Developed for the bread oven. If you are making bread at home, prefer this; it rises better than all-purpose flour.

Whole-wheat flour

Ground including bran and germ. Fiber, mineral, vitamin content is high. Protein ratio depends on the original profile of the wheat (12-15%). The dough comes out heavier; mixing with white flour (for example 50-50) gives a more balanced result. If you want to make a fully whole-wheat bread, increase the water (it absorbs more).

Cake flour (Tip 405 / low protein)

The Turkish version of the "cake flour" category. Finely milled, protein low (7-9%). For madeleines, sponge cake, pastry. Hard to find in Türkiye; in place of cake flour an AP + starch blend can be used (all-purpose 130 g + corn starch 20 g ≈ cake flour 150 g).

Durum flour / irmik (semolina)

Hard-wheat (durum wheat) flour, yellowish and coarse. The protein in it is dense and gives a solid gluten structure. For pasta, couscous, irmik helvası, Mediterranean breads. Cannot be swapped with regular wheat flour; texture is entirely different.

Rye flour

Dark, aromatic, low gluten. A fully rye-bread dough is very sticky; the rising structure is weak. In sourdough breads it is mixed at 15-30%; digestion and aroma deepen.

Almond flour and gluten-free flours

The base of gluten-free cuisine. Mixtures like almond, coconut, buckwheat, rice, quinoa, potato starch. Gluten-free doughs need binders like xanthan gum or psyllium husk; otherwise they fall apart. The Serious Eats guide for gluten-free baking.

Which flour for which recipe

A practical guide:

The Turkish "all-purpose flour for everything" gets the job done in real life, but in a specific recipe a visible difference appears if the right flour is preferred.

Protein and hydration relationship

High-protein flour absorbs more water. In bread-making this is critical: with AP flour 60% hydration is normal; with bread flour the same water → the dough is too firm. The hydration ratio is adjusted to the flour's protein content:

• AP flour (10-12% protein): 55-65% hydration (classic white bread)
• Bread flour (12-14%): 65-75% hydration
• Whole wheat (12-15%): 70-85% hydration (the bran absorbs more water)
• 00 flour for Pizza Napoletana: 58-65% hydration

If the recipe was written for a different flour, using the same water creates a texture difference. Pizza dough made with bread flour is slightly sticky but comes out more airy in the oven. If you return to AP, you can reduce the water by 5%.

Storage

Flour is sensitive to light, moisture, heat, and pests. USDA FSIS storage recommendations:

• White flour: airtight jar, cool dry place. 6-12 months safe. The fridge is not needed but the cellar/pantry is better.
• Whole wheat / rye / almond flour: high oil content (from the seed/germ), oxidizes and gives a rancid taste. 3-6 months in the fridge, 12 months in the freezer. An opened pack to the fridge.
• Flour weevil prevention: put a bay leaf in the jar; the smell repels the weevil. Or after the pack is opened, put it in the freezer for 48 hours; any eggs die.

Signs of old flour: yellow-gray color, sour or soapy smell, grain-like lump structure, mold appearance. If in doubt, discard; flour is cheap, food poisoning is expensive.

Home substitutions

If the flour you need is not at hand:

• No cake flour → AP + starch: 100 g AP flour - 2 tablespoons (take out) + 2 tablespoons corn starch. Sifted and mixed, it approaches cake-flour body.
• No bread flour → AP + vital wheat gluten: 100 g AP flour + 2 tablespoons gluten (on specialty shelves). Protein rises.
• No AP flour → Cake flour + bread flour blend: 50-50, gives an average 11% protein.
• Gluten-free alternative: specialty market blends or home-made (rice flour 40% + potato starch 30% + tapioca starch 20% + xanthan gum 1%).

A recipe made with these substitutions comes out slightly different from the original but is far from unusable.

Small practical notes

• Sifting flour is not just an old habit: it breaks large lumps, traps air at the edges like a pillow, and pastry comes out lighter.
• Measure by weighing: "1 cup of flour" can vary between 110-160 g from one cup to another. A kitchen scale is the secret of precision baking.
• Damp place + open pack: flour clumps, pulls water like a small sponge. A sealed jar + thickening slows spoilage.
• Flour + fat ratio: in Turkish poğaça, börek doughs, flour:fat below 3:1 is crumbly, above 5:1 is dry. Play in this range.

Flour selection looks like a detail, but its effect on the recipe result is one of the most important variables. On your next bread or cake attempt, the question "which flour" will change what comes to the table. In Tatonia's article, you can see that the leavening agent is the other half of this equation.

Related articles

• : the flour + yeast dough pair.
• : sourdough as flour's companion.
• : flour sweets and the set.

Sources

• King Arthur Baking: Flour Protein Reference: Flour protein ratios and variety-comparison table.
• Harold McGee, On Food and Cooking (2004): Gluten chemistry, wheat types, and the base reference on dough science.
• Serious Eats: Gluten-Free Baking: Gluten-free flour blends and the guide to binders (xanthan, psyllium).
• USDA Food Safety: Flour Handling: Flour storage and food-safety standards.
• Caputo: Tipologie di Farina: Italian flour-tip numbering and pizza-flour standards.