Best Substitutes for Cake Flour
Cake flour has about 8% protein compared to all-purpose flour's 11%. Lower protein means less gluten forms when mixed with liquid, creating tender, delicate cakes with a fine crumb. Cake flour is also bleached and milled finer than all-purpose flour. The bleaching weakens gluten further and improves how the flour absorbs fats and liquids. When you substitute, you need to match both the protein level and the fine texture. Simply swapping all-purpose flour creates denser, chewier cakes because the extra gluten toughens the structure.
Best Overall Substitute
All-purpose flour with cornstarch at a ratio of 1 cup all-purpose flour minus 2 tablespoons, plus 2 tablespoons cornstarch. Mix thoroughly and sift twice. Cornstarch dilutes the protein content to about 8.5%, closely matching cake flour. The fine cornstarch particles also mimic cake flour's silky texture.
All Substitutes
All-purpose flour with cornstarch
1 cup all-purpose flour minus 2 tablespoons, plus 2 tablespoons cornstarchCornstarch contains zero protein, so mixing 2 tablespoons into 14 tablespoons of all-purpose flour drops the protein from 11% to roughly 8.5%. Sift the mixture twice to distribute evenly and break up clumps. The cornstarch also adds the fine, powdery texture that cake flour provides. Results are nearly identical to real cake flour in layer cakes, cupcakes, and pound cakes.
All-purpose flour (straight substitution)
1:1 by volumeAll-purpose flour has 3% more protein than cake flour, creating slightly more gluten when mixed. Cakes turn out denser with a more substantial crumb. The texture is still good but less tender than with proper cake flour. For casual baking where perfect texture isn't critical, it works fine. Reduce mixing time by 30% to minimize gluten development.
Pastry flour
1:1 by volumePastry flour contains 9% protein, sitting between cake flour (8%) and all-purpose flour (11%). It produces slightly more structure than cake flour but still creates tender cakes. The texture is very close to what cake flour provides. Pastry flour is unbleached, so it doesn't absorb fats quite as well, but the difference is minimal in most recipes.
Self-rising flour (adjusted)
1:1 by volume, omit baking powder and reduce salt by 1/4 teaspoon per cupSelf-rising flour is made from low-protein flour (similar to cake flour) with baking powder and salt added. Each cup contains about 1.5 teaspoons baking powder and 0.5 teaspoons salt. When substituting, remove the baking powder from your recipe and reduce salt accordingly. The protein level works well for tender cakes, but you must adjust leavening carefully.
All-purpose flour with potato starch
1 cup all-purpose flour minus 2 tablespoons, plus 2 tablespoons potato starchPotato starch works similarly to cornstarch, diluting protein content while adding fine texture. Potato starch absorbs more moisture than cornstarch, creating exceptionally tender cakes. The starch gelatinizes during baking, helping trap moisture for longer freshness. Sift the mixture twice like the cornstarch version.
All-purpose flour with arrowroot powder
1 cup all-purpose flour minus 1.5 tablespoons, plus 1.5 tablespoons arrowroot powderArrowroot powder reduces protein content while adding silky texture. Use slightly less arrowroot than cornstarch because it's more potent at tenderizing. Arrowroot creates a particularly fine crumb and works especially well in white and vanilla cakes where you want pure flavor. The powder dissolves completely during baking with no chalky residue.
How to Adjust Your Recipe
When using all-purpose flour substitutes, reduce mixing time by 25-30% to prevent overdeveloping gluten. Mix wet and dry ingredients just until combined. For the cornstarch or starch blends, always sift twice before measuring to ensure even distribution. In high-altitude locations above 3,000 feet, reduce cornstarch by 1 teaspoon per cup since starches behave differently in low air pressure.
Increase liquid by 1-2 tablespoons per cup when using straight all-purpose flour because the extra protein absorbs more moisture. Cakes may need an extra 2-3 minutes baking time with all-purpose flour substitutes. Check doneness with a toothpick rather than relying on timing alone.
When Not to Substitute
Angel food and chiffon cakes need cake flour specifically. These delicate cakes rely on the low protein content and fine texture to support their airy structure without collapsing. All-purpose flour creates too much gluten, making them tough and dense.
Professional baking or competition entries shouldn't use substitutes if perfection matters. The texture difference, while small, is detectable to trained palates. European-style tortes and very delicate sponge cakes also perform better with real cake flour.
Avoid substitutes in recipes that call for weighing flour rather than measuring by volume. The density differences between cake flour and substitutes can throw off carefully calibrated formulas.
Frequently Asked Questions
How much cornstarch do I add to 2 cups of all-purpose flour?
Remove 4 tablespoons of all-purpose flour, then add 4 tablespoons of cornstarch. So you'll have 1 cup plus 12 tablespoons of all-purpose flour mixed with 4 tablespoons of cornstarch. Always measure the flour first, remove the required amount, then add the cornstarch. Sift twice to distribute evenly.
Can I make my own cake flour in advance and store it?
Yes, store homemade cake flour substitute in an airtight container for up to 6 months. Mix large batches using 7 cups all-purpose flour plus 1 cup cornstarch, sifted together 3 times. Label the container clearly since it looks identical to regular flour. The mixture stays fresh as long as the original flour would have.
Why do my cakes turn out dense when I use all-purpose flour instead of cake flour?
All-purpose flour contains 11% protein versus cake flour's 8%. The extra 3% protein creates more gluten strands when mixed with liquid, making a tougher network that produces dense, chewy texture. Reduce mixing time by 30% and consider the cornstarch substitute method to get closer to cake flour's tenderness.
Does cake flour go bad faster than all-purpose flour?
Cake flour lasts about the same time as all-purpose flour, roughly 6-8 months in a cool, dry place. The bleaching process doesn't affect shelf life significantly. Check for rancid smells, off colors, or pest activity. Store in airtight containers to maintain freshness and prevent moisture absorption.
Can I substitute cake flour for all-purpose flour in cookie recipes?
Avoid using cake flour in cookies. The low protein content (8% vs 11%) won't provide enough structure, causing cookies to spread excessively and break apart. They'll be overly tender and crumbly. Stick to all-purpose or bread flour for cookies that need to hold their shape during and after baking.