Butter is butter… until you’re halfway through a recipe and realise you’ve got the “wrong” kind sitting in the fridge.
It’s one of those kitchen dilemmas that crops up more often than you’d think. A cake recipe calls for unsalted butter, but you’ve only got salted. Or perhaps you’re making garlic butter and the only block available is unsalted.
Most of the time, you don’t need to abandon your baking plans. The swap is usually possible, but knowing when it matters can mean the difference between a perfectly balanced bake and one that’s just a little too salty.
What’s the difference between salted and unsalted butter?
At their core, both are made from cream. The biggest difference is exactly what the names suggest: salted butter contains added salt, while unsalted butter does not.
The amount of salt isn’t standard across brands, either. Depending on the manufacturer, salted butter typically contains around 1.5% to 2% salt, which works out to roughly ¼ teaspoon of salt per 115g (½ cup or one stick) of butter. Some brands contain slightly more or less.
Unsalted butter also tends to be the fresher option. Salt acts as a preservative, so salted butter generally has a longer shelf life, while unsalted butter is often preferred by bakers who want complete control over flavour.
Why do most baking recipes call for unsalted butter?
There’s a reason professional bakers almost always reach for unsalted butter. When a recipe has been carefully tested, every ingredient has been measured to achieve a particular result. Since different salted butters contain different amounts of salt, using them can make the finished product less predictable.
With unsalted butter, you’re in charge of exactly how much salt goes into the batter or dough. Salt also does more than simply season food. It enhances sweetness, balances flavours and strengthens gluten development in certain baked goods. Too much can make a bake taste flat or overly savoury, while too little can leave it tasting dull.
Can you substitute salted butter for unsalted butter?
Absolutely. For most everyday recipes, the difference is small enough that you probably won’t notice, especially in cookies, muffins, quick breads and brownies. The simplest adjustment is to reduce the added salt in the recipe.
As a general guide:
- For every 115g of salted butter used instead of unsalted, reduce the recipe’s salt by about ¼ teaspoon.
- If the recipe only calls for a tiny pinch of salt, you can simply leave it out altogether.
This isn’t an exact science because butter brands vary, but it’s close enough for most home baking.
What about using unsalted butter instead of salted?
This swap is even easier. If a recipe calls for salted butter and you only have unsalted, simply add a little extra salt to the recipe.
A good rule of thumb is:
- Add about ¼ teaspoon of salt for every 115g of unsalted butter replacing salted butter.
Taste isn’t the only consideration. Salt helps bring out other flavours, so adding that little bit back helps keep the recipe balanced.
When does it really matter?
Some recipes are far more forgiving than others.
Swaps usually work well for:
- Chocolate chip cookies
- Brownies
- Banana bread
- Muffins
- Pancakes
- Waffles
- Garlic butter
- Toasted sandwiches
- Pasta sauces
These recipes already contain plenty of flavour, making the small difference in salt content barely noticeable.
It’s better to stick to the recipe for:
- Buttercream frosting
- Delicate sponge cakes
- Shortbread
- French pastries
- Croissants
- Puff pastry
- Sugar cookies with subtle flavours
In recipes where butter is the star ingredient, even small flavour differences become more obvious.
Does salted butter taste different?
On toast, definitely. In baking, not always.
Salted butter has a slightly richer, more savoury flavour when eaten on its own, which is why many people prefer it spread on fresh bread, baked potatoes or sweetcorn.
Once mixed into a cake or cookie batter alongside sugar, flour and other ingredients, that distinction becomes much harder to detect.
ALSO SEE: Lamb stew with garlic butter-stuffed dombolo
Feature image: Unsplash
