Salted vs Unsalted Butter in Baking

Recipe writers favor unsalted butter for one practical reason: control. Salt content in salted butter varies from brand to brand, so a recipe built around it can taste right with one butter and salty with another. With unsalted butter, every grain of salt in the bowl is one you measured.

That does not mean salted butter ruins a bake. In most cookies, quick breads and cakes, you can use it with a small adjustment. In a few recipes where butter is the main flavor, or where salt needs to be precise, the choice matters more. This guide explains both and gives a simple conversion.

Why recipes default to unsalted

Different brands of salted butter can contain noticeably different amounts of salt, and labels rarely make that easy to compare. A cookie recipe that adds 1 teaspoon of salt on top of salted butter might be perfect with a lightly salted brand and harsh with a saltier one. Unsalted butter removes the variable.

Unsalted butter also gives a cleaner read on freshness. Salt can mask slightly stale or fridge-tainted butter, which then shows up in delicate cakes and frostings.

How to adjust for salted butter

Use the same weight of butter and reduce the recipe's added salt. A common rule is ¼ teaspoon of fine salt less for every 113 g (½ cup, 1 stick) of salted butter. If the recipe uses 227 g (2 sticks) of butter and 1 teaspoon of salt, use ½ teaspoon of salt instead.

If the recipe's added salt is already less than the amount you would remove, simply leave the salt out. Sweet bakes tolerate a slight salt variation well; savory pastry and bread less so.

• 113 g (1 stick) salted butter: reduce salt by ¼ teaspoon
• 227 g (2 sticks): reduce by ½ teaspoon
• 340 g (3 sticks): reduce by ¾ teaspoon
• Using kosher salt, which is coarser, the volume reduction is a little larger; weigh when you can

Where the choice matters most

Recipes with lots of butter and few other flavors show salt clearly. American buttercream, shortbread, Danish butter cookies, salted caramel and pie crust all fall into this group. Use unsalted and add salt to taste, so you can stop at the right point.

In heavily flavored bakes, such as chocolate brownies, spice cake or banana bread, the small difference from salted butter disappears into the other flavors. These are the best places to use up a block of salted butter.

When salted butter is a good choice

Some recipes are designed around salted butter and taste flat with unsalted unless you add more salt. Salted caramel and some traditional shortbreads and butter cakes from regions where salted butter is standard fall into this category. Read the recipe; if it says salted butter and gives little or no added salt, follow it.

For spreading on biscuits, scones and fresh bread, salted butter is often preferred for flavor. Having both in the fridge covers every situation.

Storage and freshness

Butter picks up odors from the refrigerator easily, so keep it wrapped and away from onions and leftovers. Salted butter generally stays fresh a little longer in the fridge than unsalted. Both freeze well for several months when wrapped tightly; thaw in the refrigerator overnight before baking. If butter smells cheesy, sour or like the fridge, it will flavor your bake, so use fresh butter for anything delicate.

Common questions

Can I use salted butter in cookies?

Yes. Reduce the recipe's salt by about ¼ teaspoon per stick of butter. Many bakers like the slightly saltier edge it gives chocolate chip cookies.

Can I add salt to unsalted butter for spreading?

Yes. Soften the butter and beat in a pinch of fine sea salt or flaky salt to taste. A little flaky salt gives a pleasant crunch.

Is salted butter higher in water?

Differences between brands are usually larger than any difference between salted and unsalted versions. Butterfat content, not salt, is the main thing that changes how butter bakes.