The Science Behind the Perfect Cookie (2024)

Crispy, soft, cakey or chewy: Everyone has their own idea of the perfect cookie. With so many differing definitions, how do you find that perfect balance of cookie-baking ingredients and techniques? Well, it turns out there’s actually a cookie science! Here are a few baking tips and tricks to help you attain cookie perfection.

The Chemistry Behind Baking Cookies

When it comes to creating the perfect cookies, it’s important to keep chemistry in mind. Just like in the laboratory, even the seemingly smallest changes can affect the outcome — oven temperature variations, moisture and even the order in which you add the ingredients are just a few of the factors that can affect texture and taste.


And while some may love a soft cookie, others prefer a crispier variation. But there’s no need to save two separate recipes to cater to everyone’s wishes. Just remember a few of our notes, tips and techniques below and have some fun experimenting.

The Science Behind the Perfect Cookie (2024)

FAQs

What is the chemistry of the perfect cookie? ›

Melted butter creates smaller and more holes. That makes for a chewier cookie. "On the other hand, if you incorporate chunks of cold butter into the dough, you get larger pockets of air and a fluffier, cakier cookie," she explains. You can also switch out the baking soda for baking powder for a fluffier treat.

What is the science behind baking the most delicious cookie ever? ›

The Maillard reaction is a chemical reaction between amino acids and reducing sugars, so along with the caramelizing sugar, proteins in the cookie begin to brown, producing a rich, nutty, toasted flavour. This is the same reaction that occurs in bread and seared steak.

What is the secret to a perfect cookie? ›

The key is to always use top-quality ingredients as they'll result in a better cookie; it really is that simple.
  • Always use butter.
  • Choose the right sugar.
  • Choose the right flour.
  • Check your flour is in date.
  • Choose the right kind of chocolate.
  • Cream the butter and sugar.
  • Beat in the eggs.
  • Fold in the flour.

What is the food science behind cookies? ›

Caramelization – Just as the cookie is almost finished baking, two chemical reactions happen – caramelization & Maillard reaction. As sugars in the dough break down (especially around the edges & the hot bottom), they transform into a brown, fragrant caramel gold adding to the flavours of the cookie.

What are the characteristics of a perfect cookie? ›

The best cookies have layers of texture. A slightly crisp outer shell that holds up to some heat with an inner core that's soft and chewy.

What makes cookies chewy and not hard? ›

The science is simple: According to the flour authorities over at Bob's Red Mill, cornstarch can help “soften the rigid proteins of the flour, resulting in a light and chewy dessert.” “The cornstarch complements the flour in absorbing the liquids, but won't develop gluten structure like the flour will,” stresses ...

How do you make cookies soft and chewy? ›

Baking cookies quickly in a hot oven – at 375 degrees F as opposed to a lower temperature – will make for soft results. They'll bake fast instead of sitting and drying out in the oven's hot air. Ever so slightly underbaking your cookies will give you softer results than cooking them the full amount the recipe says.

How do you shape the perfect cookie? ›

All you have to do is take the baked cookies from the oven, place a mug (or a glass) over the still warm dough, do a little swirl and voilà, perfectly round cookies.

What binds cookies together? ›

Flour is a stabilizer and thickener and controls how much the cookie rises. It holds the cookie together, providing it with its structure. If you use too little flour your cookie won't keep its shape but if you use too much you'll end up with a thick tasteless cookie.

Should I use baking powder or baking soda for cookies? ›

Baking soda is typically used for chewy cookies, while baking powder is generally used for light and airy cookies. Since baking powder is comprised of a number of ingredients (baking soda, cream of tartar, cornstarch, etc.), using it instead of pure baking soda will affect the taste of your cookies.

What is the great cookie experiment? ›

The GCE was developed to give undergraduate nursing students a taste of basic research practices and concepts. The original exercise, published in a 1987 issue of Nurse Educator, involved students sampling and comparing cookies, completing a survey, and analyzing and discussing results as a group.

What is the cookie model in chemistry? ›

Thomson's model of an atom describes that the electrons are like the chocolate chip cookies which are spread in a sphere of positive charge, which is similar to the rest of the part of the cookie.

What is the chemistry behind baking? ›

The Maillard reaction is a series of chemical reactions between amino acids and reducing sugars that occur at high temperatures. This reaction is responsible for the browning and complex flavor development in baked goods.

What is the perfect cookie texture? ›

Higher-protein bread flour makes for a chewier cookie; lower-protein cake flour gives a tender, cake-like cookie. The ratio of flour to butter also impacts the texture of your cookies. A small amount of flour compared to butter results in cookies that spread out into a wafer-like lace cookie.

How do you measure perfect cookies? ›

Teaspoon scoop: 1 3/4 measuring teaspoons dough, to make a 2" to 2 1/4" cookie. Tablespoon scoop: 4 measuring teaspoons dough, to make a a 3" to 3 1/4" cookie. Big scoop (a.k.a. muffin scoop): 1/4 cup dough, to make a 4" to 4 1/4" cookie.

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