Yes, caramelized vegetables develop both sweetness from the breakdown of sugars and umami from the Maillard reaction and the release of glutamates.
Caramelization is a complex process that occurs when vegetables are heated, typically over medium to medium-low heat, for an extended period. This process involves several chemical reactions, most notably the breakdown of complex carbohydrates (starches and sugars) into simpler sugars like glucose and fructose. These simpler sugars contribute to the sweet flavor profile. Simultaneously, the Maillard reaction takes place. This reaction involves the interaction between amino acids and reducing sugars, leading to the formation of hundreds of different flavor compounds, including those responsible for savory, meaty, and umami notes. Furthermore, some vegetables naturally contain glutamates, which are responsible for umami. Caramelization can break down cellular structures, releasing these glutamates and intensifying the umami flavor. The combination of these processes results in a complex flavor profile that balances sweetness and umami, making caramelized vegetables a versatile and delicious ingredient.
Don't overcrowd the pan when caramelizing vegetables. Overcrowding lowers the pan's temperature, causing the vegetables to steam instead of caramelize, hindering the development of both sweetness and umami. Work in batches for best results.