How to Bake Cookies That Stay Moist and Don't Spread

With thick American-style cookies, temperature control and how much you mix make or break the result. Even with the same recipe, getting these wrong can easily leave you with cookies that spread flat or, on the other hand, turn dry and hard.

Start with how you prep the ingredients

• Read the whole recipe before you start and measure everything accurately. If a recipe uses nuts, toast them ahead of time and let them cool completely before adding them, and sift the dry ingredients gently.
• Cold eggs don’t blend well with butter and raise the risk of the dough separating. Leave them out at room temperature for at least 30 minutes so they’re no longer cold before using them.
• The rest of the ingredients also mix more evenly at room temperature than straight out of the refrigerator. The bigger the temperature gap between ingredients, the more likely the dough is to separate.

Mixing butter, sugar, and eggs

• When adding sugar to butter, the butter shouldn’t be hot and melted but just slightly warm, around 30–40°C. Don’t dissolve all the sugar at this point: dissolving only about 50–60% of it keeps the cookies from spreading too much.
• If you whip hard with the whisk after adding the eggs, a lot of air gets into the dough, and as that air escapes during baking, the cookies can actually spread more. Mix just lightly, until you can no longer see the egg.

Mix the dough gently, rest it thoroughly

• After adding the dry ingredients, mix just lightly, until no dry flour is visible. The longer you mix, the more gluten develops, making the dough tough and the baked cookies crumbly.
• Once the dough is mixed, let it rest in the refrigerator long enough to chill well before baking. If the dough is warm, the butter melts first as soon as it hits the oven, and the cookies tend to spread.

The oven and baking time

• Preheat the oven at least 30 minutes before baking. The temperature drops by about 10°C the moment you open the oven door, and by another 5–10°C each time you put in a pan, so preheat with that in mind. If the oven isn’t preheated enough, the cookies bake for a long time at a low temperature and spread more.
• The longer they bake, the more moisture leaves the dough, and the cookies turn crisp or hard. Taking them out when only the edges are lightly golden brown is the best way to keep them moist. Baking time changes with the weight of each dough ball, so use the recipe’s time as a guide but check the color along the way.

Ingredients best not substituted

• All-purpose flour is hard to replace with another flour. If you really don’t have any, mixing bread flour and cake flour 1:1 gets you close.
• Honey holds on to moisture and keeps cookies moist, so don’t leave it out even when the amount is small.