Broccoli
10.0best for bakingUse peeled stems, similar mild flavor
Baked kohlrabi at 400°F for 35 minutes develops a lightly caramelized exterior and fork-tender interior — useful in gratins, vegetable tians, and stuffed-bulb preparations. Its 90% water content drives humidity into surrounding doughs or custards, so dice to 1/2-inch cubes and pre-roast 15 minutes to evaporate surface moisture before layering. Substitutes here are ranked by oven-set behavior, whether they soften uniformly on an 18-minute bake at 375°F without going chalky, and how they contribute crumb structure versus excess water release during set.
Use peeled stems, similar mild flavor
Use peeled broccoli stems only, cut to 1/2-inch cubes at 1:1 cup for a gratin or stuffed-vegetable bake at 400°F for 30 minutes. The peeled stems carry roughly 88% water — close to kohlrabi's 90% — and soften uniformly. Discard the florets, which scorch black above 400°F before the stem base cooks through.
Mild root, good raw or cooked
Dice turnips to 1/2-inch cubes at 1:1 cup for a winter root-vegetable bake at 400°F for 35 minutes. Turnips carry more starch than kohlrabi (6% versus 2%) and caramelize darker at the cube edges — expect a slightly sweeter finish, so balance with an extra pinch of salt per cup in a savory gratin build.
Crisp and mild, good raw or cooked
Peel, seed, and cube chayote to 1/2-inch pieces at 1:1 cup for layered bakes at 400°F for 28 minutes. Chayote carries 92% water — slightly higher than kohlrabi — so pre-roast 12 minutes uncovered to drive off surface moisture before folding into a gratin with cream or cheese, or the dish pools liquid during oven set.
Peel and dice; mild flavor and firm crunch
Peel tough outer strings from celery stalks and dice to 1/2-inch pieces at 1:1 cup. Bakes 25 minutes at 400°F to tender — shorter than kohlrabi's 35-minute curve because the narrower cross-section heats through faster. Its distinctive aromatic register pushes the dish toward mirepoix territory; balance with garlic and thyme in savory applications.
Crisp and mild, peel and slice thin for salads
Peel, deseed, and cube cucumber to 1/2-inch at 1:1 cup. Cucumbers carry 96% water — higher than any other swap here — so pre-salt 15 minutes and pat dry before baking at 400°F for 20 minutes. Even pre-treated, cucumber pools liquid at the base of a gratin; reserve for recipes where that moisture is absorbed by cheese or rice.
Shred for slaw, stays crunchy; peel before using
Peel outer leaves, shred cabbage to 1/4-inch ribbons at 1:1 cup. Cabbage softens through a 35-minute bake at 400°F but its sulfur compounds intensify past 25 minutes — keep the bake covered for the last 10 minutes to trap steam and moderate the smell. Best in stuffed-cabbage rolls or layered casseroles.
Mild and crunchy, works in slaws and salads
Trim fennel fronds and stalks, slice the bulb to 1/2-inch wedges at 1:1 cup. Bakes 30 minutes at 400°F until the layers separate and tips caramelize. The anise-licorice flavor shifts baked dishes sharply away from kohlrabi's mild register — pair with citrus and parmesan rather than heavy cream to balance the aromatic lift.
Mild crunch, slice thin for salad garnish
Halve or quarter radishes at 1:1 cup and bake at 400°F for 25 minutes — radishes lose most of their raw heat through cooking and turn mild like a turnip. The color fades from magenta to dusty pink in the oven; serve roasted radishes as a rustic side rather than expecting kohlrabi's pale-green appearance in the finished dish.
Low carb swap, roast or mash when tender
Crisp and mild, peel before use; roasts well
Dice and roast, mild brassica flavor
Mild and crisp, works roasted or in soups
Peel and slice, crunchier texture