2% Milk (Best Option)
1:12% milk contains slightly less fat than whole milk but retains similar protein and moisture levels, which are critical for proper gluten formation and yeast fermentation in bread dough. The fat content helps tenderize the crumb and promotes Maillard browning during baking.
When substituting, use the same volume as whole milk. Slightly lower fat may result in a marginally less tender crumb, but this difference is often imperceptible in yeast bread.
The final bread will have a comparable rise, texture, and crust color, making 2% milk the closest practical substitute for whole milk in yeast bread recipes.