Prices verified Aug 4 · Always confirm at the retailer before buying.
Quick answer
For US shoppers comparing these small baking-dish sets, Heartland Home is listed at $31.97 for a four-piece porcelain mini casserole set, while KooK is listed at $30.95 for a six-piece au gratin set. KooK is $1.02 cheaper and offers two more listed pieces; Heartland has the higher registry rating. Confirm dimensions, capacity, material, oven and microwave limits, dishwasher guidance, storage, and whether the dishes fit the recipes or serving sizes you plan to use. Piece count does not tell you the usable capacity of each dish, and listing language does not establish even heating, thermal-shock resistance, glaze quality, or cleanup. No independent cooking or breakage test was performed. UIBFCWN and NARUMI are separate alternatives, not silent replacements.
KooK is $1.02 cheaper with six listed pieces; Heartland is the higher-rated four-piece porcelain set. Verify dimensions, capacity, care, and oven limits before buying.
Mubboo Verdict
Winner
Heartland Home Porcelain Mini Casserole Dish, Set of 4
Heartland Home Porcelain Mini Casserole Dish, Set of 4 vs KooK Au Gratin Baking Dishes, Set of 6, side by side
Heartland Home Porcelain Mini Casserole Dish, Set of 4
Pros:
- 4.8-star registry rating
- Porcelain mini casserole format is named
- Four-piece set is named
Cons (honest weight):
- $1.02 above KooK
- Verify dimensions and oven limits
- No independent heat or breakage test
KooK Au Gratin Baking Dishes, Set of 6
Pros:
- Listed at $30.95
- Six-piece set is named
- Au gratin format is named
Cons (honest weight):
- $1.02 below Heartland
- Verify dimensions, material, and oven limits
- No independent heat or breakage test
Where each one wins
8 dimensions scored head-to-head. Heartland Home takes 2; KooK Au takes 3.
| Dimension | Heartland Home Porcelain Mini Casserole Dish, Set of 4 | KooK Au Gratin Baking Dishes, Set of 6 | Winner |
|---|---|---|---|
| Snapshot priceKooK is lower. | $31.97 | $30.95 | KooK Au |
| Piece countSix versus four. | 4 | 6 | KooK Au |
| Material wordingPorcelain named. | Porcelain | Verify | Heartland Home |
| FormatMini casserole versus au gratin. | Mini casserole | Au gratin | Tie |
| RatingHeartland is higher. | 4.8 | 4.7 | Heartland Home |
| Review countKooK has more. | 1,173 | 1,249 | KooK Au |
| Capacity and oven fitVerify live model. | Verify | Verify | Tie |
| Heating, breakage, and cleanupNot independently tested. | Not tested | Not tested | Tie |
| Overall | 2 wins | 3 wins | KooK Au |
Piece count is not the same as capacity
Heartland is listed at $31.97 for four mini casserole dishes, while KooK is listed at $30.95 for six au gratin dishes. KooK is $1.02 lower in the registry snapshot, but the useful choice depends on the number of servings and the usable capacity of each dish.
Check inside and outside dimensions, volume, rim shape, and storage footprint. A six-piece set may be more useful for individual servings, but only if the dishes fit your recipes, oven, and cabinets.
Material and thermal limits
Heartland names porcelain. Verify the KooK material and the exact oven, microwave, freezer, and dishwasher limits for both sets on the live listing and manufacturer instructions.
Do not move a hot dish directly into cold water or onto an unsuitable surface. Listing titles do not establish thermal-shock resistance, glaze quality, even heating, or breakage behavior.
Serving and recipe fit
Au gratin dishes can suit individual portions, side dishes, or baked recipes, but the exact size controls how much food can be used and how it cooks. Compare your most common recipes, serving count, and rack placement before choosing by piece count.
Leave appropriate clearance around the dishes and use heat protection when handling them. This comparison does not test cooking time, browning, heat distribution, or cleanup.
Ratings and evidence limits
Heartland has a 4.8-star registry rating from 1,173 reviews. KooK has 4.7 stars from 1,249. These feedback pools do not establish capacity, heating, thermal shock, breakage, glaze quality, or cleanup.
No independent test was performed for cooking results, temperature behavior, breakage, scratching, dishwasher wear, or cleanup. The recommendations are limited to current registry and listing evidence.
Alternatives
UIBFCWN offers a lower-price four-piece au gratin set, while NARUMI offers a smaller two-piece oval set. They are separate alternatives, not silent replacements; verify dimensions, material, pattern, and appliance limits.
What this comparison does not test
This page does not certify cookware safety, thermal-shock resistance, food-contact performance, or a specific recipe result. Follow the exact manufacturer instructions for the dishes you buy.
Choose KooK if the $1.02 savings and six-piece count fit your serving plan. Choose Heartland if porcelain wording and the higher registry rating matter more.
Which should you buy?
| Your situation | Pick | Why |
|---|---|---|
| Budget-first shopping | KooK Au Gratin Baking Dishes, Set of 6 | Lower listed price. |
| You serve more individual portions | KooK Au Gratin Baking Dishes, Set of 6 | Six pieces. |
| You prefer porcelain | Heartland Home Porcelain Mini Casserole Dish, Set of 4 | Porcelain wording. |
| You have a small oven | Heartland Home Porcelain Mini Casserole Dish, Set of 4 | Check dimensions. |
| You use a dishwasher | Heartland Home Porcelain Mini Casserole Dish, Set of 4 | Verify care first. |
| You need tested cooking results | Heartland Home Porcelain Mini Casserole Dish, Set of 4 | No heating winner claimed. |
Lower listed price.
Six pieces.
Porcelain wording.
Check dimensions.
Verify care first.
No heating winner claimed.
What if neither is right?
UIBFCWN Au Gratin Baking Dishes, Set of 4
$23.99
A current in-stock alternative; verify dimensions, material, oven limits, and included pieces.
NARUMI Oval Gratin Dish Set, Set of 2
$80.83
A current in-stock alternative; verify dimensions, pattern, oven limits, and current package details.
Frequently Asked Questions
Which is better, Heartland Home or KooK au gratin dishes?
Heartland is the higher-rated four-piece porcelain mini-dish set. KooK is the slightly lower-price six-piece option. Choose by capacity, material, appliance limits, serving count, and storage rather than piece count alone.
Which au gratin set is cheaper?
KooK is listed at $30.95 versus $31.97 for Heartland in the US registry snapshot. Check the live package and seller before ordering.
How many dishes are included?
The captured titles list four Heartland dishes and six KooK dishes. Verify exact pieces, dimensions, and material on the live listing.
Are these dishes oven and dishwasher safe?
Appliance and care limits depend on the exact model. Read the current manufacturer instructions and follow the stated temperature, microwave, freezer, and dishwasher guidance.
Did Mubboo test cooking or breakage?
No. This comparison uses registry and listing evidence and does not include controlled testing of heating, cooking results, thermal shock, breakage, glaze, or cleanup.
Primary sources: Price, rating, review count, stock, and product images use the exact US registry records for Heartland Home and KooK. The captured titles support the stated piece count and porcelain/au gratin wording; the registry snapshot was not a controlled test of capacity, thermal shock, cooking, breakage, or cleanup.
Who wrote this and where's the data from?
Author: Mubboo Editorial Team. Independent US-market consumer research using registry records and exact listing information. Last verified: 2026-08-04.