When it comes to versatile countertop ovens, Cuisinart has long been a trusted brand, delivering appliances that combine precision, performance, and convenience. Two of its standout models, the Cuisinart CSO-300N Convection Steam Oven and the Cuisinart TOB-135 Deluxe Convection Toaster Oven Broiler, cater to slightly different culinary needs but share a commitment to high-quality cooking.
The CSO-300N introduces a modern twist to traditional convection ovens with its integrated steam function, offering a revolutionary way to bake, roast, and reheat foods with enhanced moisture retention and flavor. Meanwhile, the TOB-135 Deluxe represents the classic toaster oven experience elevated with convection technology, ideal for users who want fast, even cooking without sacrificing traditional textures like crispiness and browning.
This comparison dives deep into each oven’s features, performance, usability, and suitability to help you determine which is the right fit for your kitchen.
| Feature | Cuisinart CSO-300N | Cuisinart TOB-135 Deluxe |
|---|---|---|
| Cooking Technology | Convection Steam Oven | Convection Toaster Oven Broiler |
| Power | 1800W | 1800W |
| Cooking Functions | Steam, Bake, Roast, Reheat, Proof | Bake, Broil, Toast, Convection Bake, Bagel, Pizza |
| Capacity | 0.6 cu. ft (approx. 6 slices) | 0.8 cu. ft (6-slice toaster oven equivalent) |
| Temperature Range | 85°F – 450°F | 150°F – 450°F |
| Size (WxDxH) | 19.1 x 16 x 13 in | 17 x 16 x 11 in |
| Price Range | Higher | Moderate |
| Specialty | Retains moisture, perfect for baking bread & delicate foods | Crisping, toasting, broiling, versatile convection cooking |
| Ideal For | Health-conscious bakers, steam cooking enthusiasts | Everyday cooks, families needing fast, versatile meals |
The CSO-300N and TOB-135 represent two approaches to modern countertop ovens. While both use convection technology to improve heat circulation and cooking consistency, their core differentiation lies in the addition of steam in the CSO-300N and the classic toasting and broiling flexibility of the TOB-135.
CSO-300N is built for those who value moisture retention in meats and baked goods, offering an almost professional-level baking experience. The TOB-135, on the other hand, shines in versatility, handling everything from toasted bagels to broiled fish with even cooking thanks to its convection fan.
The CSO-300N is a true countertop revolution, merging convection airflow with steam injection to create an environment that keeps baked goods tender, meats juicy, and vegetables crisp-tender. Its digital touch interface allows precise control over temperature and steam levels, making it ideal for delicate baking such as artisan breads or custards.
Key highlights include:
This oven is particularly appealing to those who bake frequently or want restaurant-style results at home.

Cuisinart CSO-300N Convection Steam Oven Review
The TOB-135 Deluxe represents a high-performance all-rounder in the toaster oven category. While it lacks the steam functionality, it compensates with traditional broiling, baking, and toasting functions, enhanced by a convection fan for faster, even cooking.
Notable features include:
This oven is perfect for those who want speed, versatility, and reliable performance without the complexity of steam cooking.

Cuisinart TOB-135 Deluxe Convection Toaster Oven Broiler Review
| Feature | CSO-300N | TOB-135 Deluxe |
|---|---|---|
| Steam Function | Yes | No |
| Convection | Yes | Yes |
| Broil | No | Yes |
| Toast | No | Yes |
| Bake | Yes | Yes |
| Reheat | Yes | Yes |
| Multi-Stage Cooking | Yes | No |
| Interior Light | Yes | Yes |
| Digital Controls | Advanced | Moderate |
The CSO-300N is feature-rich for precision and specialty cooking, whereas the TOB-135 emphasizes broad versatility and traditional functions.
For those prioritizing moisture-sensitive baking, CSO-300N is unmatched. For quick, versatile cooking, TOB-135 leads.
The TOB-135 has a slightly larger interior, suitable for full 6-slice toasts, 13-inch pizzas, or sheet pan meals. The CSO-300N, while slightly smaller, is optimized for specialized cooking and can accommodate most standard baking trays. The difference is subtle but worth considering depending on whether you bake in bulk or focus on precision cooking.
Both ovens operate at 1800W, but cooking efficiency varies:


Choosing between the CSO-300N and the TOB-135 Deluxe comes down to your cooking priorities. If precision, steam-assisted baking, and gourmet-quality meals appeal to you, the CSO-300N is worth the investment. If speed, versatility, and traditional toasting/broiling are more important, the TOB-135 offers excellent value and performance.
The primary difference lies in functionality and cooking technology. The Cuisinart CSO-300N is a steam and convection oven that uses steam injection to retain moisture in foods, making it ideal for baking bread, reheating leftovers, and cooking delicate dishes. In contrast, the TOB-135 is a traditional convection toaster oven broiler that relies on dry heat and fan-assisted air circulation for even cooking and browning. The CSO-300N is more versatile for specialized cooking tasks, while the TOB-135 focuses on everyday toasting, baking, and broiling.
The Cuisinart CSO-300N is generally better for baking and reheating due to its steam functionality. Steam helps prevent food from drying out, making it especially useful for bread, pastries, and leftovers like pizza or roasted meats. The TOB-135 can still bake effectively with convection heat, but it lacks the moisture-retention benefits of steam, which can result in drier outcomes when reheating or baking certain foods.
The TOB-135 Deluxe Convection Toaster Oven Broiler typically offers a larger interior capacity, accommodating items like a 12-inch pizza or multiple slices of toast at once. The CSO-300N, while versatile, has a more compact interior due to its steam system components. This makes the TOB-135 more suitable for families or batch cooking, while the CSO-300N is better suited for smaller portions or specialty cooking tasks.
The TOB-135 is generally easier to clean because it lacks a water reservoir and steam system. It typically includes a nonstick interior and removable crumb tray for straightforward maintenance. The CSO-300N requires additional care, including regular cleaning of the water reservoir and internal components to prevent mineral buildup from steam usage. However, many users find the extra maintenance worthwhile for the improved cooking results.
Value depends on your cooking needs. The TOB-135 is usually more affordable and provides excellent performance for standard tasks like toasting, baking, and broiling, making it a strong value choice for most households. The CSO-300N is typically more expensive due to its steam cooking capability, but it offers unique benefits that justify the price for users who frequently bake bread, reheat meals, or want enhanced moisture control in cooking.