Choose your substitute based on the dish type and desired flavor match. High-starch options like Russet and Yukon Gold suit mash and roasts; red potatoes suit shape-holding dishes.
Prepare the substitute as directed: adjust ratios and prep as noted for each option. For example, steam-dry Russets before mashing and parboil them before roasting for best results.
Apply the substitution ratio carefully. Start with the stated 1:1 amount and adjust to taste, especially for sweet potatoes and parsnips where moisture and flavor differ from Maris Piper.
Taste and adjust seasoning. Some substitutes shift flavor or texture slightly, particularly sweet potatoes and parsnips, which may require extra salt, pepper, or a splash of cream to balance.