Why Starch Gets Crispy When Fried | Cook's Illustrated (2024)

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Why Starch Gets Crispy When Fried | Cook's Illustrated? ›

The hydrated granules swell when they are initially heated in the oil, allowing the starch molecules to move about and separate from one another. As water is driven away during the frying process, these starch molecules lock into place, forming a rigid, brittle network with a porous, open structure.

The high temperature of the oil causes the water in the food to evaporate, creating a crispy exterior and a juicy interior. The oil also adds a rich and savory flavor to the food, as well as a moist and tender texture.

Frying starchy foods in oil is a complex process, comprising several closely linked physicochemical reactions and transformations, such as starch gelatinisation, water vaporisation, protein denaturation, and crust formation (Hindra and Baik, 2006; Sobukola and Bouchon, 2014).

Corn Starch: Adding a thin coating of corn starch to the potato fries before frying can help create a crispier exterior. When the corn starch comes into contact with the hot oil, it forms a barrier that traps moisture within the potato while also developing a crunchy crust.

In addition to Maillard browning, frying also causes the water in food to evaporate. This evaporation creates a steam pressure that forces the food to expand. As the food expands, it forms a thin, crispy crust.

The hydrated granules swell when they are initially heated in the oil, allowing the starch molecules to move about and separate from one another. As water is driven away during the frying process, these starch molecules lock into place, forming a rigid, brittle network with a porous, open structure.

Cornstarch Is the Secret to the Crispiest Fried Chicken

It's primarily used as a thickening or gelling ingredient, but it's also a smart ingredient for making cookies softer and for holding together fillings for jammy bars. And, it's the secret ingredient for getting crispy coatings like tempura paper-thin.

Placing the cooked cornstarch in your freezer helps it compact further and gives it a satisfying crunchy texture. For super crunchy cornstarch chunks, leave them in the freezer for 24 to 48 hours.

Cornstarch typically makes for a crispier finish than flour. Cornstarch absorbs moisture from the food and expands, giving deep-fried foods a crispy coating. When the food is fried, the moisture cooks out of the cornstarch, leaving a crackly, puffy coating on the outside.

A baking stone, or pizza stone, is a large piece of thick, ceramic tile that sits on the rack of your oven. By preheating the stone along with the oven to a high temperature—think in the 450°F to 500°F range—it picks up and retains a ton of heat that provides exceptional browning for your bottom crust.

Which starch will create the crispiest batter for frying? ›

Use Cornstarch or Rice Flour

Michael says that cornstarch or rice flour in combo with flour will give you the crunchiest batter. Even cake four will cook up crunchier than all-purpose flour because it doesn't have a high gluten level.

The best way to keep fried foods crispy? Just place them on a cooling rack set over a baking sheet. If you're frying multiple batches, throw the whole setup into a low oven to keep everything warm as you keep frying and adding to the rack.

Crispy Fry® Battermix, an all-in-one product containing a batter and a breading pack made while special blend of flour, starch, spices, and seasonings providing delicious fried chicken with fuller extra crunch.

The short answer. Frying food in oil makes things crispy because oil conducts heat at a much higher temperature than water. So when hot oil makes contact with to-be-cooked food (which has moisture), it causes the water on the surface of the food to rapidly evaporate leading to a crispy texture.

During frying, the water released from the food into the hot oil produces steam that cause hydrolysis of oil. The resulting free fatty acids are rapidly oxidized and promote thermal oxidation, polymerization, and cyclization.

Double frying helps with that evaporation process. By letting the chicken rest and cool between the dips in the oil, additional water evaporates from the skin. When you put it back in to finish frying, the rest of the water evaporates, which allows the skin to brown and crisp quickly before the meat overcooks.