Room temperature butter for cookies: what does that actually mean, and how do you know when your butter is at the right temperature for mixing?
When you’re baking cookies, the instructions usually say, “use room temperature butter.”
But what does that mean — especially when “room temperature” in Maine is not the same as “room temperature” in Alabama in July?
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My room temperature on the Maine coast is going to be quite different from the room temperature in an un air-conditioned kitchen in Indiana.
The ideal temperature for butter is 65 to 67 degrees, which is actually a teensy bit cooler than the classic room temperature of 72.
Chef and cookbook author Christopher Kimball wrote in his classic The Dessert Bible that it’s better to err on the cooler side for butter.
One of the easiest ways for a new baker to learn the feel of a butter suitable for a batch of cookies is to use a digital thermometer.
Butter frozen or too cold? Learn How to Soften Butter Quickly
I use this quick-read digital kitchen thermometer all the time and it gives me the temperature in a second whether I’m baking a cake or grilling a piece of fish.
This instant read thermometer is less expensive option.
Clues Your Butter Is the Right Temp
There are physical clues to look and feel for in deciding if your butter is a suitable temperature for creaming with sugar for your cookie dough.
You should be able to slightly indent the stick of butter with your finger.
If you can push your finger in and the butter smushes, it’s much too warm. Put the butter back in the fridge for 30 or 45 minutes.
Butter at the correct temp for baking cookies will be easy to spread.
Unwrap the butter. Does it look greasy? Then it’s too warm.
Why does butter temperature matter when baking cookies?
Volume is one issue.
Creaming butter and sugar together is a crucial first step in most cookie recipes.
If the butter is too warm, it won’t trap enough air, which means less volume, fewer cookies, and a denser texture.
Of course, butter that’s too cold, say straight out of the fridge and 40 degrees isn’t good either. That will also affect volume.
However, if your butter is just a couple degrees too cold, then beat it for a two to three minutes before you add sugar to start creaming them together.
What About Cookie or Bar Recipes with Melted Butter?
Some recipes call for melted butter, including my workplace favorite Congo Bars.
That's because you want a denser, fudgier batter.
How Do I Get the Right Butter Temperature for Baking Cookies?
The most hassle free way to ensure you have room temperature butter for your cookies is to plan ahead.
Pull the butter out of the fridge about 2½ to 3 hours before you plan to start baking.
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