The smell of sweet cookies wafted down the first-floor hallway of VISTA. For a moment, the Grauer Science Lab could have been mistaken for a bakery, as freshmen in the Lab Science By Design class made batch after batch of sugar cookies — all in the name of science.

To start, students followed a recipe provided by their teacher, carefully measuring each ingredient before adding it to their mixing bowls. Precision mattered. After combining the dry components with the wet, they rolled six uniform dough balls and arranged them neatly on a cookie sheet. Into the toaster ovens they went, where anticipation grew as the dough slowly transformed under the heat. Students watched as round dough balls melted outward, spreading and browning into flat, golden cookies.

When the timers chimed, the lab buzzed with activity. Cookie sheets were pulled from the ovens, and students began recording their observations. Their data was qualitative and sensory-based: How did the cookies look? What did they smell like? How did they feel? Could you hear them snap when they broke apart? And perhaps most importantly, how did they taste?

Armed with independent research on cookie chemistry, the students returned to the lab for round two. This time, they made a single, intentional change to the recipe — one independent variable — to see how it would affect texture, spread, and flavor. Swapping white sugar for brown could change crispiness. Softening butter instead of melting it could alter chew and spread. Tweaking the leavening agent might determine whether a cookie rose tall or stayed satisfyingly flat.

“We chose to substitute all-purpose flour for cake flour,” shared Brooklynn Romaniello ’29. Cake flour, which contains cornstarch and less protein, typically produces softer, lighter baked goods. Unfortunately, the result wasn’t quite what Brooklynn and her partner hoped for. “The cookie didn’t flatten, and it was very dry,” she said — a valuable result, even if it wasn’t the tastiest.

Colby D’Arcy ’29 had better luck with her adjustment. “I chose to add brown sugar because I wanted a sweeter cookie but didn’t want to add too much sugar,” she explained. “Brown sugar adds a balance of a little bit of savory and sweet.” The result: a cookie that hit the mark.

No matter the outcome, the lab offered students far more than a sweet reward. It sharpened their measurement skills, reinforced the importance of controlling variables, and highlighted the value of close observation and detailed documentation — skills often overshadowed in labs focused solely on numbers. In the end, the lesson was clear: science is everywhere, even in a warm, golden cookie. Sometimes, the best way to understand chemistry is to taste it.
 

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