Fried Onions

Using equal parts butter and lard creates an ideal frying medium: butter provides flavor while lard has a higher smoke point (around 375°F vs butter's 350°F), preventing burning. Covering the onions initially steams them, breaking down harsh sulfur compounds and converting starches to sugars through enzymatic activity. Removing the lid allows moisture to evaporate, concentrating sugars on the surface which then caramelize through the Maillard reaction, creating complex savory-sweet flavors and golden-brown color.