Make the 3-ingredient Brown Sugar Italian Chicken Recipe for sticky, juicy weeknight chicken in under 45 minutes.
Preheat the oven to 375°F (190°C) so it's ready when the assembled dish goes in; this simple first action sets the stage and ensures even baking and caramelization later. Think of this as the quiet professional step — warm the oven, then move on to arranging the ingredients while it comes up to temperature.
Place the three boneless, skinless chicken breasts spaced evenly in a rectangular baking dish lined with shiny aluminum foil, skinless sides up so the glaze will cling to the surface. Keep the pieces roughly similar in size and give each a little breathing room so the sauce can pool and caramelize between them.
Evenly sprinkle the 1/4 cup of brown sugar over each breast so you see a light, granular dusting that will melt into a glaze. Pour the 1/2 cup Italian dressing over and around the breasts so it mingles with the sugar into a glossy amber pool; the sugar should appear speckled and beginning to dissolve into the dressing where it touches the meat.

Slide the foil-lined dish into the preheated oven and bake for 30–35 minutes, monitoring for an internal temperature of 165°F (74°C). The cooking transforms the sugar and dressing into a sticky, caramelized coating that browns at the edges and keeps the chicken juicy inside.
Remove the baked chicken from the oven and let it rest in the rectangular dish for a few minutes; this short pause allows juices to redistribute and the glaze to thicken slightly, settling into a glossy, clingy sauce around the breasts.
Transfer or present the three glistening, browned breasts right in the same foil-lined rectangular baking dish, the caramelized brown-sugar-Italian glaze pooling amber and slightly thickened beneath them, ready to be served warm.
