Subway is a global fast-food chain known for its healthy and delicious sandwiches, wraps, and salads. One of the appealing aspects of Subway is its customization options, allowing customers to tailor their sandwiches to their tastes. Toasting the sandwiches is one such option that adds a layer of warmth and crunchiness to the overall sandwich experience.

In this article, we will explore the temperature at which Subway toasts their sandwiches, why this specific temperature range is chosen, and how it affects the final product.

Also Read: Does Subway Charge Extra for Toasting?

What Temperature Does Subway Toast Their Sandwiches?

Subway toasts their sandwiches in a convection oven within the temperature range of 350-400 degrees Fahrenheit (175-205 degrees Celsius). This temperature range is critical to achieve the perfect balance of crispiness, warmth, and texture while maintaining the nutritional content and taste of the ingredients. Convection ovens circulate hot air evenly, ensuring that the entire sandwich is uniformly toasted.

What Temperature Does Subway Toast Their Sandwiches?

Why 350-400 Degrees Fahrenheit?

The 350-400 degrees Fahrenheit range is considered the ideal toasting temperature for sandwiches for several reasons:

  • Crispiness and Texture: Toasting at this temperature range promotes the Maillard reaction, a chemical reaction between amino acids and reducing sugars that gives browned food its distinctive flavor. This reaction occurs around 300-400 degrees Fahrenheit, providing the perfect texture and crispiness to the bread.
  • Nutrient Preservation: Higher temperatures can lead to the degradation of certain nutrients in the sandwich ingredients, such as vitamins and proteins. Toasting at 350-400 degrees Fahrenheit helps preserve these nutrients while still achieving the desired texture.
  • Food Safety: Toasting at this temperature range also ensures that any potential bacteria or pathogens on the sandwich ingredients are eliminated, ensuring food safety.

The Science Behind Toasting

Toasting bread is a process that transforms the texture and flavor of the bread through a combination of chemical reactions and physical changes. The primary chemical reaction that occurs during toasting is the Maillard reaction, as mentioned earlier. This reaction produces a variety of flavor compounds and contributes to the browning of the bread.

Another important aspect of toasting is the process of starch gelatinization. As bread is heated, the starch molecules absorb water and expand, undergoing a gel-like transformation. As the temperature increases, the starch gelatinizes, contributing to the crispiness of the bread.

Toasting Techniques at Subway

Subway uses a variety of toasting techniques to achieve the perfect sandwich:

  • Convection Ovens: Subway employs convection ovens that circulate hot air evenly around the sandwich, ensuring uniform toasting.
  • Customization: Customers can choose their preferred level of toasting, allowing for a personalized sandwich experience.
  • Bread Selection: Different bread types have different toasting properties. Subway offers a variety of bread options to cater to different preferences and dietary requirements.

Frequently Asked Questions (FAQs)

Q: Can I choose not to have my sandwich toasted at Subway?

A: Yes, toasting is an optional feature at Subway. You can choose to have your sandwich served cold or toasted, depending on your preference.

Q: Is there a difference in taste between toasted and non-toasted sandwiches?

A: Toasting a sandwich can enhance its flavor by promoting the Maillard reaction and adding a layer of crispiness to the bread. However, some people prefer the taste and texture of non-toasted sandwiches.

Q: How long does it take to toast a sandwich at Subway?

A: Toasting a sandwich at Subway typically takes around 45 seconds to 1 minute, depending on the type of bread and the level of toasting desired by the customer.

Q: Are there any health concerns with toasting sandwiches?

A: Toasting at the 350-400 degrees Fahrenheit range used by Subway ensures that the nutritional content of the ingredients is preserved while eliminating potential bacteria or pathogens. However, over-toasting or burning the bread can create acrylamide, a compound that has been linked to potential health risks. Subway’s toasting process minimizes the formation of acrylamide by adhering to the ideal temperature range.

Q: Does toasting a sandwich affect its calorie content?

A: Toasting a sandwich at Subway does not significantly alter its calorie content. The primary change is in the texture and flavor of the bread, which can enhance the overall taste and experience of the sandwich.


Subway toasts their sandwiches at a temperature range of 350-400 degrees Fahrenheit, ensuring an ideal balance of crispiness, warmth, and texture while maintaining the nutritional content and taste of the ingredients. The toasting process relies on the Maillard reaction, starch gelatinization, and convection oven technology to deliver a consistently delicious and customizable sandwich experience.